FAQ

No. TerraSignal is an earthquake awareness and monitoring app. It uses public seismic data sources to help you understand activity near places you care about. Always follow official emergency guidance from local authorities, emergency services, geological agencies, and tsunami warning centers.

TerraSignal currently uses trusted public seismic sources such as USGS and EMSC. Some additional sources may appear as planned, diagnostic, historical, or research-only until they are reliable enough for live alerts.

Early earthquake reports are often automatic. Magnitude, depth, location, and confidence can change as more seismic stations report in. TerraSignal shows the most recent available information, but official sources may revise events over time.

Watch Zones are places you want TerraSignal to monitor — such as your home, family locations, travel destinations, coastal areas, or earthquake-prone regions. TerraSignal summarizes activity for each zone and can send alerts based on your settings.

No. Location access is optional. You can create Watch Zones manually or by dropping a pin. If you allow location access, TerraSignal can show distance from you or your saved home location.

Alerts depend on your Watch Zones, magnitude threshold, notification permissions, server registration, Apple Push Notification delivery, network conditions, quiet hours, and source availability. TerraSignal is designed to be reliable, but no app can guarantee every alert will arrive instantly.

Green means low or minor activity. Yellow means active or noticeable activity. Orange means elevated activity worth monitoring. Red means critical or major activity. TerraSignal uses these colors to make earthquake status easy to understand quickly.

Preliminary means early earthquake details may still change. This is normal. Magnitude, depth, and location may be revised as more data becomes available from additional seismic stations.

It means TerraSignal has not detected an active tsunami advisory for that event from the available sources. Always follow official tsunami warning centers and local emergency guidance near coastal areas.

TerraSignal includes free features including one Watch Zone, earthquake activity dashboard, standard alerts, and basic map access. TerraSignal Pro may unlock additional Watch Zones, advanced alert controls, enhanced source features, and future hazard layers as they become available. Pro pricing will be finalized after early tester feedback.

That is the long-term plan. TerraSignal is being built as a calm signal layer for important hazards — starting with earthquakes and tsunami awareness, with possible future support for volcanic activity, fire warnings, high-wind and storm alerts, hurricanes, and tornado alerts. New hazard layers will only be enabled when they are reliable enough to ship.

Email support@terrasignal.app for app support questions.

Email privacy@terrasignal.app for privacy questions, data requests, or policy concerns. You can also read the full Privacy Policy.