Skip to main content

Earthquake Guides

Learn about earthquakes, safety preparedness, seismology, and tectonic science.

📖

Earthquake Basics

Earthquake Basics 4 min read

What Is an Earthquake? A Complete Introduction

Learn what causes earthquakes, how they occur along fault lines, and why some regions experience more seismic activity than others.

Earthquake Basics 4 min read

How Earthquakes Are Measured: Magnitude vs Intensity

Understand the critical difference between earthquake magnitude (energy released) and intensity (shaking felt), and why both measurements matter.

Earthquake Basics 4 min read

The Richter Scale Explained: History, Formula, and Limitations

Discover the history of the Richter scale, how Charles Richter created it in 1935, and why scientists now prefer the moment magnitude scale.

Earthquake Basics 4 min read

Understanding the Moment Magnitude Scale

The moment magnitude scale (Mw) is the modern gold standard for measuring earthquakes. Learn how it works and why it replaced the Richter scale.

Earthquake Basics 4 min read

Modified Mercalli Intensity: Measuring What You Feel

The Modified Mercalli Intensity scale rates earthquake effects from I (not felt) to XII (total destruction). Learn what each level means.

Earthquake Basics 5 min read

P-Waves and S-Waves: How Seismic Waves Travel

Learn how P-waves and S-waves travel through Earth, why P-waves arrive first, and how scientists use them to locate earthquakes.

Earthquake Basics 4 min read

Surface Waves: Love Waves and Rayleigh Waves Explained

Surface waves cause the most earthquake damage. Understand how Love waves and Rayleigh waves move and why they're so destructive.

Earthquake Basics 4 min read

Epicenter vs Hypocenter: What's the Difference?

The epicenter is on the surface; the hypocenter is underground. Learn how scientists locate both and why the distinction matters for safety.

Earthquake Basics 5 min read

Earthquake Depth: Shallow, Intermediate, and Deep Quakes

Earthquake depth dramatically affects damage. Learn the three depth categories, why shallow quakes are deadliest, and what deep earthquakes reveal.

Earthquake Basics 4 min read

Aftershocks Explained: Why Earthquakes Come in Clusters

Aftershocks can continue for months or years after a major earthquake. Learn what causes them, how they're predicted, and when they'll stop.

Earthquake Basics 4 min read

Foreshocks: Can They Predict the Main Event?

Foreshocks occur before some major earthquakes, but can they be used for prediction? Learn the science behind foreshocks and their limitations.

Earthquake Basics 3 min read

Earthquake Swarms: When Small Quakes Won't Stop

Earthquake swarms produce hundreds of small tremors without a clear mainshock. Learn what causes them and whether they signal bigger events.

Earthquake Basics 4 min read

How Long Do Earthquakes Last?

Most earthquakes last seconds, but great earthquakes can shake for minutes. Learn what determines duration and why it matters for damage.

Earthquake Basics 4 min read

The Energy of Earthquakes: TNT, Atomic Bombs, and Beyond

A magnitude 9 earthquake releases energy equal to 25,000 nuclear bombs. Explore the staggering energy scale of earthquakes with real comparisons.

Earthquake Basics 4 min read

Earthquake Frequency: How Often Do They Happen?

About 500,000 earthquakes occur yearly, but only 100 cause damage. Learn the frequency-magnitude relationship and why big quakes are rare.

🏗️

Buildings & Engineering

Buildings & Engineering 6 min read

How Buildings Respond to Earthquakes

Buildings sway, crack, and can collapse during earthquakes. Learn the engineering principles behind how structures respond to seismic forces.

Buildings & Engineering 6 min read

Base Isolation Explained: Buildings on Bearings

Base isolation decouples buildings from ground shaking using rubber bearings. Learn how this technology protects hospitals, bridges, and homes.

Buildings & Engineering 5 min read

Seismic Dampers: Shock Absorbers for Buildings

Seismic dampers absorb earthquake energy like giant shock absorbers. Learn how viscous, friction, and tuned mass dampers protect skyscrapers.

Buildings & Engineering 5 min read

The Soft Story Problem: Why Some Buildings Collapse

Soft story buildings with open ground floors are deadly in earthquakes. Learn how to identify them and what retrofitting options exist.

Buildings & Engineering 5 min read

Unreinforced Masonry: The Most Dangerous Building Type

Unreinforced masonry buildings kill more people in earthquakes than any other type. Learn the risks and how communities address this deadly legacy.

Buildings & Engineering 5 min read

Earthquake-Resistant Design Principles

Modern earthquake-resistant design uses ductility, redundancy, and energy dissipation. Learn the engineering principles that save lives.

Buildings & Engineering 5 min read

How to Evaluate Your Building's Seismic Safety

Learn to assess your building's earthquake vulnerability. A practical guide to identifying structural risks and when to hire a professional.

Buildings & Engineering 6 min read

Retrofitting Your Home for Earthquakes

Earthquake retrofitting strengthens your home's foundation and framing. Learn the most effective upgrades and their costs for homeowners.

Buildings & Engineering 5 min read

Steel vs Concrete: Which Is Better in Earthquakes?

Steel and concrete respond differently to earthquakes. Learn the strengths and weaknesses of each material for seismic-resistant construction.

Buildings & Engineering 4 min read

Wood Frame Buildings in Earthquakes

Wood frame construction performs well in earthquakes due to flexibility and light weight. Learn why wood is often the safest residential material.

Buildings & Engineering 5 min read

Skyscrapers and Earthquakes: Engineering Marvels

Skyscrapers use advanced engineering to withstand earthquakes. Learn how tall buildings resist seismic forces with dampers and flexible design.

Buildings & Engineering 5 min read

How Bridges Survive Earthquakes

Bridge earthquake engineering prevents catastrophic collapses. Learn about seismic isolation bearings, ductile columns, and retrofit strategies.

Buildings & Engineering 5 min read

Dam Safety and Seismic Risk

Dam failures during earthquakes can cause catastrophic flooding. Learn how dams are designed and evaluated for seismic safety.

Buildings & Engineering 5 min read

Hospital Design for Earthquake Resistance

Hospitals must remain operational after earthquakes. Learn about special seismic design requirements for medical facilities.

Buildings & Engineering 7 min read

The Evolution of Building Codes After Major Earthquakes

Every major earthquake reveals building failures that reshape building codes. Trace the evolution of seismic design standards from 1906 to today.

📜

Historical Events

Historical Events 5 min read

The 2011 Tohoku Earthquake and Tsunami: A Complete Analysis

The 2011 M9.1 Tohoku earthquake triggered a devastating tsunami and nuclear disaster. A comprehensive analysis of one of history's worst earthquakes.

Historical Events 5 min read

The 2010 Haiti Earthquake: Disaster and Response

The 2010 M7.0 Haiti earthquake killed over 200,000 people. Learn why the devastation was so extreme and the lessons for earthquake preparedness.

Historical Events 5 min read

The 2004 Indian Ocean Tsunami: The Deadliest Wave

The 2004 M9.1 Sumatra earthquake generated a tsunami that killed 230,000 people across 14 countries. The disaster that changed warning systems.

Historical Events 5 min read

The 1906 San Francisco Earthquake: Birth of Modern Seismology

The 1906 M7.9 San Francisco earthquake and fire reshaped a city and launched modern earthquake science. The quake that changed everything.

Historical Events 4 min read

The 1960 Great Chilean Earthquake: The Largest Ever Recorded

At M9.5, the 1960 Chile earthquake remains the most powerful ever recorded. Its tsunami crossed the Pacific Ocean and reached Japan.

Historical Events 4 min read

The 1976 Tangshan Earthquake: China's Deadliest Disaster

The 1976 M7.5 Tangshan earthquake killed an estimated 242,000 people. The deadliest earthquake of the 20th century.

Historical Events 4 min read

The 1964 Alaska Earthquake: The Great Alaskan Quake

The 1964 M9.2 Alaska earthquake was the most powerful earthquake in US history. Its lessons shaped modern building codes and tsunami science.

Historical Events 4 min read

The 1995 Kobe Earthquake: Japan's Wake-Up Call

The 1995 M6.9 Kobe earthquake exposed critical flaws in Japan's earthquake preparedness, killing 6,400 and transforming building codes.

Historical Events 4 min read

The 1556 Shaanxi Earthquake: The Deadliest in History

The 1556 Shaanxi earthquake killed approximately 830,000 people, making it the deadliest earthquake in recorded human history.

Historical Events 5 min read

The 2015 Nepal Earthquake: The Gorkha Quake

The 2015 M7.8 Nepal earthquake devastated Kathmandu and triggered avalanches on Everest. A study in building vulnerability and international response.

Historical Events 5 min read

The 1755 Lisbon Earthquake: When Philosophy Changed

The 1755 Lisbon earthquake, tsunami, and fire destroyed one of Europe's greatest cities and sparked the Enlightenment debate on natural evil.

Historical Events 5 min read

The 2023 Turkey-Syria Earthquake: Double Disaster

Two devastating earthquakes within hours killed over 50,000 in Turkey and Syria. The most destructive earthquake disaster of the 2020s.

Historical Events 4 min read

The 1989 Loma Prieta Earthquake: The World Series Quake

The 1989 M6.9 Loma Prieta earthquake struck during the World Series, collapsing freeways and exposing soft-story building dangers.

Historical Events 5 min read

The 2010 Chile Earthquake: Megathrust Lessons

The 2010 M8.8 Chile earthquake showed how strong building codes save lives. Lessons from one of the largest earthquakes ever recorded.

Historical Events 5 min read

The 1923 Great Kanto Earthquake: Tokyo's Destruction

The 1923 M7.9 Kanto earthquake destroyed Tokyo and Yokohama, killing over 140,000. The firestorms were deadlier than the shaking itself.

💰

Insurance & Financial

Insurance & Financial 3 min read

Do You Need Earthquake Insurance? A Complete Guide

Homeowners insurance doesn't cover earthquakes. Learn who needs earthquake insurance, what it costs, and how to decide if it's worth the premium.

Insurance & Financial 4 min read

How Earthquake Insurance Works: Premiums, Deductibles, and Coverage

Earthquake insurance has unique deductibles (10-25% of home value) and coverage terms. Understand premiums, exclusions, and what's actually covered.

Insurance & Financial 4 min read

Earthquake Insurance by State: A US Comparison

Earthquake insurance availability and cost varies dramatically by US state. Compare rates and coverage options across high-risk and low-risk areas.

Insurance & Financial 4 min read

California Earthquake Authority (CEA) Explained

The CEA is the largest residential earthquake insurance provider in the US. Learn about its policies, deductible options, and retrofit discounts.

Insurance & Financial 4 min read

Flood Insurance vs Earthquake Insurance: Know the Difference

Flood and earthquake insurance are separate policies with different rules. Understand which natural disasters are covered and where gaps exist.

Insurance & Financial 4 min read

Renters Earthquake Insurance: What You Need to Know

Renters can get affordable earthquake insurance for personal property and temporary living expenses. Learn the costs and coverage options.

Insurance & Financial 4 min read

Commercial Earthquake Insurance for Business Owners

Business earthquake insurance covers property damage, business interruption, and liability. Learn what commercial policies include and cost.

Insurance & Financial 4 min read

How to File an Earthquake Insurance Claim

Filing an earthquake insurance claim requires documentation and patience. Learn the step-by-step process to maximize your claim settlement.

Insurance & Financial 4 min read

Earthquake Insurance Costs: What Affects Your Premium

Earthquake insurance premiums range from $100 to $5,000+ annually. Learn what factors determine your cost and how to lower your premium.

Insurance & Financial 4 min read

Does Homeowners Insurance Cover Earthquakes?

Standard homeowners insurance excludes earthquake damage. Learn what's covered, what's not, and why you need a separate earthquake policy.

Insurance & Financial 4 min read

Earthquake Insurance in Japan: How It Works

Japan's earthquake insurance system is backed by government reinsurance. Learn how it differs from US earthquake insurance and what it covers.

Insurance & Financial 4 min read

Earthquake Retrofitting and Insurance Discounts

Seismic retrofitting can reduce earthquake insurance premiums by 5-25%. Learn which upgrades qualify for discounts and their cost-benefit analysis.

Insurance & Financial 5 min read

Catastrophe Bonds: How Wall Street Handles Earthquake Risk

Catastrophe bonds transfer earthquake risk to capital markets. Learn how cat bonds work and their role in funding disaster recovery.

Insurance & Financial 5 min read

After the Earthquake: Navigating the Claims Process

The earthquake insurance claims process can take months. Learn how to document damage, work with adjusters, and appeal denied claims.

Insurance & Financial 5 min read

The True Cost of Not Having Earthquake Insurance

Without earthquake insurance, homeowners face financial ruin. Calculate the real cost of going uninsured in a seismically active area.

Myths & Facts

Myths & Facts 4 min read

Can Animals Predict Earthquakes? What Science Says

Reports of animals acting strangely before earthquakes go back centuries. Learn what science actually says about animal earthquake prediction.

Myths & Facts 4 min read

Earthquake Weather: Why It's a Myth

There is no such thing as earthquake weather. Learn why this persistent myth has no scientific basis and what actually triggers earthquakes.

Myths & Facts 4 min read

Can Small Earthquakes Prevent Big Ones?

Small earthquakes do not release enough energy to prevent large ones. Learn the math behind why this popular belief is wrong.

Myths & Facts 5 min read

Standing in a Doorway: Why This Advice Is Outdated

Standing in a doorway during an earthquake is outdated advice that can be dangerous. Learn why Drop, Cover, Hold On is safer.

Myths & Facts 5 min read

Are Earthquakes Becoming More Frequent?

It seems like earthquakes are increasing, but improved detection explains the trend. Learn what the data actually shows about earthquake frequency.

Myths & Facts 5 min read

Can Humans Cause Earthquakes? The Truth About Induced Seismicity

Fracking, mining, and reservoir filling can trigger earthquakes. Learn the science of induced seismicity and which human activities pose real risk.

Myths & Facts 4 min read

The Big One in California: Separating Fact from Fiction

California's Big One is real science, not science fiction. Learn what seismologists actually predict and how California is preparing.

Myths & Facts 4 min read

Do Earthquakes Only Happen Along Fault Lines?

While most earthquakes occur along faults, intraplate earthquakes can strike far from plate boundaries. Learn where unexpected earthquakes happen.

Myths & Facts 4 min read

Can We Predict Earthquakes with Apps?

No app can predict earthquakes. Learn the difference between prediction and early warning, and which apps actually provide useful alerts.

Myths & Facts 4 min read

Moon Phases and Earthquakes: Is There a Connection?

Tidal forces from the moon have a tiny effect on earthquake triggering. Learn what research shows about lunar influence on seismicity.

Myths & Facts 4 min read

Triangle of Life vs Drop Cover Hold On

The Triangle of Life theory contradicts scientific consensus. Learn why Drop Cover Hold On remains the recommended earthquake safety action.

Myths & Facts 5 min read

Are Some Countries Immune to Earthquakes?

No country is completely immune to earthquakes. Learn why even stable continental regions can experience unexpected seismic events.

Myths & Facts 4 min read

Can Nuclear Tests Cause Earthquakes?

Nuclear tests produce seismic waves but don't trigger natural earthquakes. Learn how seismologists distinguish explosions from earthquakes.

Myths & Facts 5 min read

Do Buildings Pancake in Every Earthquake?

Pancake collapse is dramatic but specific to certain building types. Learn which structures are vulnerable and how modern codes prevent collapse.

Myths & Facts 5 min read

Is It True That Earthquakes Are Getting Stronger?

Earthquakes are not getting stronger. Learn why it might seem that way and what the historical record reveals about earthquake magnitude trends.

🛡️

Emergency Preparedness

Emergency Preparedness 5 min read

The Complete Earthquake Preparedness Checklist

A comprehensive, step-by-step earthquake preparedness checklist covering supplies, home safety, communication plans, and financial protection.

Emergency Preparedness 6 min read

Building Your Earthquake Emergency Kit

Build a complete earthquake emergency kit with our detailed guide. Covers water, food, first aid, tools, and special needs for families.

Emergency Preparedness 5 min read

Drop, Cover, and Hold On: The Right Way to React

Drop, Cover, and Hold On is the proven earthquake safety action. Learn the correct technique and why alternatives like doorways are dangerous.

Emergency Preparedness 6 min read

Earthquake-Proofing Your Home: A Room-by-Room Guide

Protect your home from earthquake damage with this room-by-room guide to securing furniture, appliances, and structural weak points.

Emergency Preparedness 5 min read

What to Do During an Earthquake: Indoor Safety

Know exactly what to do during earthquake shaking when you're indoors. Covers homes, offices, stores, elevators, and other indoor scenarios.

Emergency Preparedness 6 min read

What to Do During an Earthquake: Outdoor Safety

Outdoor earthquake safety differs from indoor. Learn what to do if you're driving, walking, near buildings, at the beach, or in the mountains.

Emergency Preparedness 6 min read

After the Earthquake: Your First 72 Hours

The first 72 hours after an earthquake are critical. Learn the step-by-step actions for safety, communication, shelter, and recovery.

Emergency Preparedness 6 min read

Earthquake Preparedness for Families with Children

Help your children prepare for earthquakes with age-appropriate education, practice drills, and a family-specific emergency plan.

Emergency Preparedness 5 min read

Earthquake Preparedness for Seniors and People with Disabilities

Earthquake preparedness for seniors and people with disabilities requires special planning for mobility, medications, and communication needs.

Emergency Preparedness 5 min read

Pet Safety During Earthquakes

Protect your pets during earthquakes with proper preparation, safe containment, and a pet-specific emergency kit with supplies for 72+ hours.

Emergency Preparedness 5 min read

Workplace Earthquake Preparedness

Workplace earthquake preparedness protects employees and ensures business continuity. Learn emergency plans, drills, and structural assessments.

Emergency Preparedness 6 min read

Earthquake Preparedness for Apartment Dwellers

Apartment earthquake preparedness has unique challenges. Learn about building assessments, neighbor coordination, and renter-specific strategies.

Emergency Preparedness 6 min read

Creating a Family Communication Plan

A family earthquake communication plan ensures everyone reconnects after a quake. Learn how to create one with backup contacts and meeting points.

Emergency Preparedness 6 min read

Earthquake Drills: How to Practice Effectively

Regular earthquake drills save lives. Learn how to run effective drills at home, school, and work with proper technique and follow-up.

Emergency Preparedness 7 min read

When to Evacuate: Tsunami Warnings After Earthquakes

Know when to evacuate after a coastal earthquake. Learn tsunami warning signs, evacuation routes, and how warning systems work.

🌍

Regional Guides

Regional Guides 5 min read

Earthquake Risk in Japan: The Most Prepared Nation

Japan experiences 1,500+ earthquakes yearly. Learn how the world's most earthquake-prepared nation protects its people with technology and building codes.

Regional Guides 4 min read

California's Earthquake Landscape: Living on the San Andreas

California sits on the San Andreas Fault, one of the world's most studied. Learn about the Big One risk, ShakeAlert, and how Californians prepare.

Regional Guides 4 min read

Turkey's Seismic Challenge: The Anatolian Fault System

Turkey's North and East Anatolian Faults produce devastating earthquakes. Learn about the tectonic forces and building safety challenges.

Regional Guides 4 min read

Indonesia's Ring of Fire Position: Islands of Earthquakes

Indonesia spans multiple subduction zones on the Ring of Fire. Learn about its earthquake and tsunami risks across 17,000 islands.

Regional Guides 4 min read

Italy's Earthquake History: From Pompeii to L'Aquila

Italy's collision with Africa creates significant seismic risk. Learn about historical earthquakes and the challenge of protecting ancient structures.

Regional Guides 4 min read

New Zealand's Alpine Fault: Overdue for a Major Quake

New Zealand's Alpine Fault has a 75% chance of rupturing within 50 years. Learn about this locked fault and its potential M8+ earthquake.

Regional Guides 4 min read

Mexico's Earthquake Zones: Triple Junction Risk

Mexico City faces severe earthquake risk due to subduction zones and soft lake-bed soil amplification. Learn about SASMEX and seismic preparedness.

Regional Guides 4 min read

Iran's Seismic Hazard: Collision Zone Earthquakes

Iran sits on the collision zone between the Arabian and Eurasian plates, producing frequent destructive earthquakes in vulnerable communities.

Regional Guides 3 min read

Chile: The Most Seismically Active Country

Chile experiences more large earthquakes per capita than any nation. Learn how strict building codes have reduced casualties despite constant seismicity.

Regional Guides 4 min read

Nepal and the Himalayan Collision Zone

The India-Eurasia collision builds the Himalayas and creates major earthquake risk for Nepal, Bangladesh, and northern India.

Regional Guides 4 min read

The Philippines: Typhoons and Earthquakes

The Philippines faces compound earthquake and typhoon risks on the Ring of Fire. Learn about its subduction zones and multi-hazard challenges.

Regional Guides 4 min read

Greece and the Mediterranean Seismic Zone

Greece is the most seismically active country in Europe. Learn about the Hellenic subduction zone and Mediterranean earthquake risk.

Regional Guides 4 min read

Central America's Volcanic Earthquake Zone

Central America sits above the Cocos Plate subduction zone, producing earthquakes and volcanoes from Guatemala to Panama.

Regional Guides 4 min read

Pakistan and the Makran Subduction Zone

Pakistan's Makran subduction zone and collision tectonics create significant earthquake and tsunami risk for its 230 million people.

Regional Guides 4 min read

Caribbean Earthquake Risk: Hidden Hazards

The Caribbean faces earthquake and tsunami risk from multiple plate boundaries. Learn about the hidden seismic hazards threatening island nations.

🚑

Disaster Response

Disaster Response 5 min read

How Search and Rescue Works After an Earthquake

Search and rescue teams race against the 72-hour survival window. Learn how urban search and rescue operates after earthquake disasters.

Disaster Response 5 min read

The First 72 Hours: Emergency Response Timeline

The first 72 hours after an earthquake determine survival outcomes. Learn the emergency response timeline from initial shaking to organized relief.

Disaster Response 5 min read

Community Emergency Response Teams (CERT)

CERT trains civilians to help their communities after earthquakes. Learn how to join, what training involves, and why CERT matters.

Disaster Response 6 min read

International Disaster Relief: How the World Responds

International earthquake relief involves dozens of countries and organizations. Learn how the global disaster response system works.

Disaster Response 5 min read

Triage After Earthquakes: Medical Response Priorities

Medical triage after earthquakes prioritizes treatment based on severity. Learn the triage process and how medical teams manage mass casualties.

Disaster Response 5 min read

Temporary Shelter After Earthquakes

Millions may need shelter after a major earthquake. Learn about emergency shelters, transitional housing, and long-term recovery options.

Disaster Response 5 min read

Restoring Utilities After an Earthquake

Water, electricity, and gas restoration after earthquakes takes days to weeks. Learn the priority order and safety checks for utility restoration.

Disaster Response 5 min read

Psychological Impact of Earthquakes: Coping Strategies

Earthquakes cause lasting psychological trauma including PTSD and anxiety. Learn coping strategies and when to seek professional help.

Disaster Response 5 min read

How Governments Assess Earthquake Damage

Post-earthquake damage assessment uses rapid visual screening and detailed inspections. Learn how buildings get tagged green, yellow, or red.

Disaster Response 5 min read

Volunteer Safety During Earthquake Response

Volunteering after earthquakes requires training and safety awareness. Learn how to help effectively without becoming another victim.

Disaster Response 5 min read

Social Media During Earthquakes: Help vs Misinformation

Social media spreads both vital information and dangerous rumors during earthquakes. Learn to identify reliable sources and combat misinformation.

Disaster Response 6 min read

Post-Earthquake Building Safety Inspections

After an earthquake, buildings must be inspected before reoccupation. Learn about the ATC-20 tagging system and what each color means.

Disaster Response 6 min read

Economic Recovery After Major Earthquakes

Earthquake economic recovery can take years to decades. Learn about reconstruction costs, economic impacts, and financial recovery strategies.

Disaster Response 6 min read

Earthquake Early Warning: Those Critical Seconds

Even 10 seconds of earthquake early warning saves lives. Learn how automated systems use those critical seconds to protect people and infrastructure.

Disaster Response 6 min read

Lessons Learned from Recent Earthquake Responses

Each earthquake teaches lessons for future preparedness. Review the key takeaways from recent earthquakes that improved response protocols.

🔬

Seismic Science

Seismic Science 5 min read

Plate Tectonics: The Engine Behind Earthquakes

How tectonic plates move, collide, and generate earthquakes — the fundamental theory explaining Earth's seismic activity.

Seismic Science 5 min read

Subduction Zones: Earth's Most Powerful Earthquake Factories

Subduction zones produce the world's largest earthquakes including the M9.5 Chile 1960 event. Learn how they work and where they exist.

Seismic Science 5 min read

The Ring of Fire: Why the Pacific Rim Shakes

90% of earthquakes occur around the Ring of Fire. Explore this 40,000 km horseshoe of volcanic and seismic activity.

Seismic Science 5 min read

Transform Faults: When Plates Slide Past Each Other

Transform faults like the San Andreas produce major earthquakes. Learn how horizontal plate motion creates destructive seismicity.

Seismic Science 5 min read

How Faults Work: Strike-Slip, Normal, and Reverse

Faults are where earthquakes happen. Learn the three main fault types and how each produces different kinds of seismic events.

Seismic Science 5 min read

Mantle Convection: The Heat Engine Driving Plate Motion

Earth's mantle circulates like a slow-motion boiler, driving tectonic plates. Learn how heat from the core powers earthquakes.

Seismic Science 5 min read

Lithosphere and Asthenosphere: Earth's Moving Layers

The rigid lithosphere rides atop the flowing asthenosphere. Understand these layers and how they enable plate tectonics.

Seismic Science 5 min read

How Seismographs Work: From Analog to Digital

Seismographs detect ground motion as small as a nanometer. Learn the mechanics from Milne's pendulum to modern broadband sensors.

Seismic Science 5 min read

The Global Seismographic Network Explained

150+ stations monitor every earthquake on Earth. Learn how the GSN works and why it's essential for global seismic safety.

Seismic Science 5 min read

Earthquake Early Warning Systems: How They Work

Earthquake early warning provides seconds of life-saving alert. Learn how ShakeAlert, SASMEX, and Japan's system detect quakes.

Seismic Science 5 min read

GPS and Earthquakes: Measuring Ground Deformation

GPS stations track millimeter-scale crustal movements revealing how strain builds on faults between earthquakes.

Seismic Science 5 min read

InSAR: Seeing Earthquakes from Space

Satellite radar reveals ground deformation from earthquakes with centimeter precision. Learn how InSAR maps fault slip from orbit.

Seismic Science 5 min read

Paleoseismology: Reading Earthquake History in Rocks

Prehistoric earthquakes left geological evidence. Learn how scientists dig trenches across faults to read thousands of years of seismic history.

Seismic Science 6 min read

Can We Predict Earthquakes? Science vs Myth

Despite decades of research, reliable earthquake prediction remains impossible. Learn why forecasting probabilities is the best we can do.

Seismic Science 5 min read

The Gutenberg-Richter Law: Frequency-Magnitude Relationship

For every M7, there are ten M6s and a hundred M5s. Learn the foundational statistical law governing earthquake occurrence.

🔧

Tools & Technology

Tools & Technology 4 min read

How to Use the USGS Earthquake Map

The USGS earthquake map shows every detected earthquake in near-real time. Learn how to read it, filter data, and understand earthquake feeds.

Tools & Technology 4 min read

Understanding ShakeMap: Intensity in Real Time

ShakeMap shows earthquake shaking intensity within minutes. Learn how to read these maps and what they reveal about ground motion.

Tools & Technology 4 min read

How Earthquake Early Warning Apps Work

Earthquake early warning apps can give you seconds of warning before shaking arrives. Learn how ShakeAlert and MyShake work.

Tools & Technology 4 min read

MyShake App: Your Phone as a Seismometer

MyShake turns your smartphone into a seismometer and earthquake early warning receiver. Learn how this crowdsourced network detects earthquakes.

Tools & Technology 4 min read

How to Read a Seismogram

Seismograms record the ground motion of earthquakes. Learn to identify P-waves, S-waves, surface waves, and extract earthquake information.

Tools & Technology 4 min read

Earthquake Magnitude Calculators: How They Work

Earthquake magnitude calculators convert between scales and compute energy. Learn how they work and what the numbers really mean.

Tools & Technology 4 min read

Tsunami Warning Systems: From Ocean Sensors to Your Phone

Tsunami warning systems use ocean floor sensors and satellite communication to alert coastal populations. Learn how the global warning network operates.

Tools & Technology 4 min read

How GPS Stations Track Tectonic Plate Movement

GPS stations measure plate movements of millimeters per year. Learn how this technology reveals fault strain and earthquake hazard.

Tools & Technology 4 min read

Probabilistic Seismic Hazard Analysis Tools

PSHA tools calculate earthquake probabilities for any location. Learn how hazard maps are made and what they mean for your area.

Tools & Technology 4 min read

How Earthquake Building Codes Are Developed

Building codes evolve after each major earthquake. Learn how engineers translate seismic research into construction standards that save lives.

Tools & Technology 5 min read

Smart Building Technology for Earthquake Resistance

Smart buildings use sensors and active systems to resist earthquakes. Learn about base isolation, active damping, and structural health monitoring.

Tools & Technology 4 min read

Earthquake Simulation Software: Engineering Tools

Engineers use earthquake simulation software to test building designs before construction. Learn about the tools that make buildings safer.

Tools & Technology 5 min read

How to Set Up Earthquake Alerts on Your Phone

Set up earthquake alerts on your phone using ShakeAlert, wireless emergency alerts, and apps. A step-by-step guide for Android and iOS.

Tools & Technology 5 min read

Interpreting Earthquake Data: A Beginner's Guide

Learn to interpret earthquake data including magnitude, depth, intensity, and location. A practical guide to reading earthquake reports.

Tools & Technology 5 min read

The Future of Earthquake Detection Technology

From fiber optic sensing to AI pattern recognition, the next generation of earthquake detection technology promises earlier warnings and better forecasts.