Support

Frequently asked questions

Does QuakeLens predict earthquakes?

No. Nobody can predict earthquakes, and QuakeLens never claims to. What it measures is statistics: when recent small-quake activity in a zone rises measurably above that zone's own long-term baseline, the zone goes into alert. An alert means elevated probability — similar to how seismologists describe aftershock risk — not a prediction. Most alerts are not followed by a damaging earthquake, and quiet activity does not mean an area is safe.

Is QuakeLens an early-warning system?

No. Early-warning systems (such as national services like ShakeAlert or AFAD's warnings) detect an earthquake that has already started and give you seconds before the shaking arrives. QuakeLens does something different: it watches activity trends over hours and days. If an official early-warning app is available where you live, keep it — QuakeLens complements it, it never replaces it.

Why was there no alert before the earthquake in my area?

Because most earthquakes strike without measurable warning signs. In our historical backtests, fewer than 1 in 10 large earthquakes overall — and about 3 in 10 in highly active continental regions like Türkiye — were preceded by unusual activity the detector could catch; the rest arrived out of nowhere. Each zone's report card in the app shows exactly which past earthquakes were preceded by an alert and which were missed.

Why is my zone so large, or centered far from my location?

Zones are drawn around fault systems, not cities. The earthquakes that matter to a coastal city on a subduction zone, for example, mostly happen offshore — so the zone must reach the seismogenic region, often 150–200 km away. A large circle is not imprecision; it is where the relevant activity actually happens.

What does the free version include?

The free app shows the full live status of one location — state, activity, and history, with alerts never hidden. QuakeLens Watch (a yearly subscription with a one-week free trial, or a one-time lifetime purchase) adds push notifications, unlimited locations, hourly charts, and widgets.

How do I delete my data?

Deleting the app is enough — the anonymous registration on our server is removed automatically. Details are in the privacy policy.