Epicentral for the iPhone, iPad (& Mac)

Explore Global Earthquake Patterns

About Epicentral

Epicentral is a network-based educational application that displays lists and maps of earthquakes that occurred during the last day, week, or month. This version runs on iPhones, iPads, and Macs (as an iPad App) but requires iOS and macOS 26+.

The data are served by the U.S. Geological Survey or the European-Mediterranean Seismological Centre (Version 3.0 adds GEOFON, INGV, and GeoNet feeds). List updates take at most a few 10s of seconds. For each event, a summary of the event’s properties and relationship to nearby seismicity is presented. For additional information, links are provided to connect to the event-specific earthquake information page. Several historical earthquake catalogs (sourced from the US Geological Survey) are included to provide context for more recent earthquakes.

User's Guide - Version 2.4.0, March 2024 (epub version)

Epicentral_Documents_2026_3.0.0.pdf

Additional Screenshots and Tips

Epicentral Video Tips (under development)

Accessing Focal Mechanism Information

Extended Event Info 01

Additional Information

Current Version: 3.1.2

Epicentral requires iOS and macOS 26+ (Tahoe) because I used the most recent versions of the Apple frameworks to develop the app. The newest frameworks allow integration of many of Apple's latest OS features and enable the app to run on iPhones, iPads, and Macs.

View the Epicentral privacy policy here: Privacy Policy

This site is: https://sites.google.com/view/epicentral

Bug reports to: ammon.geophysics at gmail.com

Release History

Version 3.0.0 (May 2026)

Added the ability to acquire events from the FDSN services of the GEFON, INGV, and GeoNet, which include an alternative global coverage (GEFON) and regional coverage of Italy (INGV) and New Zealand (GeoNet). Added the ability to acquire and view select extended event information (requires a second call to the earthquake feed source). This includes multiple magnitudes, location uncertainty estimates, and faulting geometry information from moment-tensor estimates. Improved search features, including a history and the ability to search for events within a specified distance from a reference location. Added multiple windows capability to the iPad and Mac. Made some map options more convenient in a pop-up menu on the map. Added the ability to rotate the global view in a kiosk-like mode. Added a long-press pop-up menu to the event list items to see extended event information, set the reference location, or copy textual summaries of the events.

Version 2.4.0 (March 2024)

Added the ability to acquire events from the FDSN services of the European-Mediterranean Seismological Centre, which includes more uniform global coverage than the US Geological Survey.

Version 2.3.0 (March 2024)

included a statistical summary for the detailed map view and included context-providing events to place recent seismicity in a recent historical context.

Version 2.2.0 (February 2024)

Added link to the support page (tap on the epicentral logo).

Version 2.1.0 (January 2024)

Added link to the support page.

Added Number-of-events-per-day chart into the Global Statistics sheet.

Added active regions and large event lists.

Version 2.0.0 (January 2024)

Initial Release

Page updated

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