MK Earthquake Monitor

MuhsinKosoglu

About this app

Earthquake Detection and Early Warning System

MK Earthquake Monitor is a free earthquake early warning app that detects P-waves and S-waves using your phone's accelerometer sensor, working completely offline. No data collection. No ads. No internet required. No location permission needed.

This app is dedicated to all those who lost their lives in earthquake disasters. It was developed to keep their memory alive and to defend life.

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⚡ HOW IT WORKS

When an earthquake occurs, two different waves propagate:
- The fast P-wave arrives first
- The destructive S-wave arrives next

MK Earthquake Monitor detects both waves — two independent filters run in parallel; whichever meets the condition first triggers the alarm.

Most apps on the market only detect the S-wave, meaning they warn after shaking has already begun. Because MK Earthquake Monitor also detects the P-wave, it can warn before the S-wave arrives in distant earthquakes.

Tested with real accelerometer data from USGS and CESMD; in an Mw 7.3 earthquake simulation, the alarm was triggered at all sensitivity levels.

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🔔 FEATURES

✓ P-wave and S-wave detection — two independent filters in parallel
✓ 9-level sensitivity adjustment — customizable for device model and environment
✓ Live MMI measurement — converts acceleration data to the international Mercalli Intensity Scale
✓ Sound, vibration, and flash alarm — alarm tone selectable
✓ WakeLock support — uninterrupted operation even in Android deep sleep mode
✓ Active hours — battery saving by operating only during your defined periods
✓ Rail system noise filter — filters subway and tram vibrations
✓ Official links: AFAD, USGS, and JMA
✓ Languages: Türkçe · English · 日本語

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📊 ALGORITHM

Shaking acceleration is converted to the international MMI (Modified Mercalli Intensity Scale) value and displayed live on screen. The algorithm was developed through comparative calculations against standard values in the MMI III–VII range.

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🔒 PRIVACY AND SECURITY

This app is not a commercial tool; it is a safety service.

- Does not collect data — does not record, process, or send any personal information over the internet
- Works completely offline
- Does not request location permission
- All features are free
- No advertisements

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📺 PROMO VIDEO

To see the app's features and interface in action:
https://www.youtube.com/shorts/B1Phyz5lmB4

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⚠️ LEGAL DISCLAIMER

MK Earthquake Monitor is an early warning aid; it is not an official earthquake warning system. Device location, ground type, building structure, and sensor quality directly affect detection performance. The app cannot guarantee an alarm under all conditions. It cannot be held responsible for damages arising from warnings it fails to provide.

What’s new

- Fixed an issue where some button text was getting cut off in the Spanish interface
- App size and performance improvements