我们能用应用预测地震吗?

The Myth: Smartphone Apps Can Predict Earthquakes

The app economy has transformed how people interact with every domain of life, and earthquake awareness is no exception. A proliferating ecosystem of apps claims to warn users of incoming earthquakes, predict quakes from unusual patterns, or crowdsource early detection. Some apps claim to detect "electromagnetic precursors" or "ionospheric disturbances" that allegedly precede earthquakes. Others promise to combine your phone's accelerometer data with crowd signals to provide minutes of warning. The promises are appealing, especially in an era when technology seems to make the impossible routine. But earthquake prediction remains beyond current science, and most apps claiming predictive capability are not what they seem.

The Fundamental Distinction: Prediction vs. Early Warning

The most important concept for evaluating earthquake apps is the distinction between 地震预报与地震预测的区别地震预报是指明确指出未来地震的确切时间、地点和震级——目前尚无法实现。地震预测则是对某一时间段内地震发生可能性的概率性估计。 and early warning. These are fundamentally different capabilities.

Earthquake prediction — knowing in advance that a specific magnitude earthquake will occur at a specific location within a specific time window — is currently impossible with any reliable accuracy. No app, algorithm, or technology can do this, despite many claims to the contrary.

Earthquake 地震预警（EEW）一种在强震到达前探测地震并向人员和系统发送警报的系统，可提供数秒至数十秒的预警时间，足以采取自我保护行动。 is something entirely different and genuinely real. It detects P-waves from an earthquake that has already started, calculates the likely shaking intensity at distant locations, and sends alerts that arrive before the damaging S-waves and surface waves. The window is seconds to a few tens of seconds — enough to take cover, stop trains, pause surgeries, open firehouse doors. This is real-time physics, not prediction.

Legitimate Apps: [[ShakeAlert]] and Government-Backed Systems

[[ShakeAlert]] is the USGS-developed early warning system for the western United States, operational in California, Oregon, and Washington. It uses a network of hundreds of seismic sensors to detect P-wave arrivals, rapidly estimate earthquake parameters, and issue warnings to subscribers. The My Shake app (University of California Berkeley) and the FEMA/USGS ShakeAlert Earthquake Early Warning apps deliver these legitimate alerts to smartphones.

These apps genuinely work within their physical limitations: they provide real-time warning of ongoing earthquakes, with lead times proportional to how far you are from the epicenter. They cannot warn about future earthquakes they haven't detected yet. This is analogous to how a smoke detector works — it detects fire that is already happening, it doesn't predict when you will next accidentally leave something on the stove.

Pseudoscientific Apps and Their Red Flags

A separate category of apps makes claims that go well beyond what physics and seismology support. Common red flags include:

Apps that claim to predict earthquakes days or weeks in advance based on electromagnetic signals, atmospheric ionization, or animal behavior reports. No peer-reviewed science supports these mechanisms as reliable precursors, and any pattern-finding from these inputs is almost certainly spurious (see confirmation bias discussion elsewhere).

Apps that aggregate crowdsourced "feeling dizzy" or "animals acting strange" reports and use machine learning to predict earthquakes. While machine learning is powerful, it cannot extract predictive signal from data that contains no reliable signal. Training a model on weak correlations produces confident-sounding predictions that fail in prospective testing.

Apps that exploit the novelty of smartphone magnetometers and accelerometers to claim detection of "pre-seismic electromagnetic pulses." While phones do have these sensors, they are designed for consumer use cases (compass, step counting) and are not calibrated seismometers. The noise floor of a smartphone accelerometer is far too high to detect genuine pre-seismic signals even if such signals existed reliably, which they don't.

The 加速度计测量地面运动加速度的传感器，对地震工程至关重要。现代强震加速度计能够记录大地震附近的剧烈震动。 Reality Check

Modern smartphones do contain 加速度计测量地面运动加速度的传感器，对地震工程至关重要。现代强震加速度计能够记录大地震附近的剧烈震动。 sensors sensitive enough to detect strong earthquake ground motion — a smartphone on a table during a M4.0 earthquake will record detectable vibration. This capability has been used legitimately for crowdsourced strong motion networks (MyShake's seismic detection mode, for example) that help characterize earthquake shaking intensity in real time for events that have already occurred.

But there is a vast gulf between detecting ground motion from an ongoing earthquake (legitimate and useful) and detecting any signal that predicts a future earthquake (currently impossible). The former is an engineering problem with a solution; the latter is a scientific frontier with no demonstrated breakthrough.

Why False Prediction Apps Are Harmful

Apps that claim earthquake prediction capability cause real harm beyond the obvious financial exploitation of scared users. They generate constant false alarms, which create panic and erode trust in legitimate warning systems. When a real earthquake warning arrives through ShakeAlert预警系统由美国地质调查局及多所大学合作运营的美国地震预警系统，覆盖美国西海岸（加利福尼亚州、俄勒冈州、华盛顿州），通过无线紧急警报发送提醒。 after users have received dozens of false alarms from prediction apps, they may dismiss the legitimate alert. The "boy who cried wolf" problem is not hypothetical — studies of warning system effectiveness consistently find that false alarm rates critically undermine public response.

They also provide false reassurance when predictions don't materialize — users may lower their actual 地震防灾准备为减轻地震影响而持续进行的规划与准备过程，包括固定家具、制定通讯计划、储备应急物资以及开展演练。 because they believe an app is "watching" for danger.

The Current State of Earthquake Forecasting Science

Legitimate earthquake 地震预报与地震预测的区别地震预报是指明确指出未来地震的确切时间、地点和震级——目前尚无法实现。地震预测则是对某一时间段内地震发生可能性的概率性估计。 science focuses on probabilistic hazard assessment over long time periods, as discussed in the USGS hazard map program. Short-term operational forecasting — elevated probability windows of days to weeks following significant earthquakes — is possible because 余震在同一断层区域内、发生于主震之后的较小地震。余震序列可持续数周至数年，最大余震的震级通常比主震低1.0至1.2级。 sequences are predictable in statistical terms using 大森公式描述余震频率随时间衰减规律的经验公式：余震发生率大致与距主震的时间成反比递减。 and related models. After a M6.0 earthquake, scientists can estimate that there is approximately a 5% chance of a larger aftershock in the following week. This is useful information for emergency managers, but it is not earthquake prediction in the folk sense, and no app has improved on these statistical models through any novel data source.

How to Use Earthquake Technology Wisely

Install government-backed 地震预警（EEW）一种在强震到达前探测地震并向人员和系统发送警报的系统，可提供数秒至数十秒的预警时间，足以采取自我保护行动。 apps appropriate to your region (ShakeAlert/MyShake for the US West Coast, PLUM/NHK for Japan, SASMEX for Mexico). Understand what they actually do — detect ongoing earthquakes, not predict future ones. Treat any app claiming prediction capability with strong skepticism and check whether its methodology has been peer-reviewed in reputable seismological journals. Use the Seismic Risk Checker for probabilistic hazard information based on real seismological data.