V
- M5.4 - M5.4 Earthquake in the Philippines, MMI V
This earthquake, although not one of the largest, was detected at our Citizen seismic stations, more than 10,500 km away.
Seismic waves know no distance and can travel across the entire planet, even if we don't perceive them. These movements are so powerful that they are recorded at our seismic stations.
The video shows the moment the wave arrives and, consequently, the seismic alarms are triggered.
Interestingly, the video shows the arrival of the PKiKP wave (green), which reaches the Earth's core and bounces back to the surface, spreading across the planet and triggering alarms in the 1 to 5 Hz range.
Earthquake data:
| Date and time of origin: | 2025-09-18 19:52:10 UTC |
| Date and time of arrival at the Citizen seismic station: | 2025-09-18 20:05:45 UTC |
| Location where the station is located: | Germans Sàbat, Girona, ES (EU) |
| Time difference from the event to arrival at the station: | 13 minutes and 35 seconds |
| Distance from the epicenter to the station: | 10.846,20 Km |
| Wave speed: | 13,31 km/s => 13.308,23 m/s |
| Wave type (according to speed): | SKS |
| Sensor type: | Geophone 4.5Hz - 200 V/m/s |
| Sampling frequency (sps): | 100Hz |
| Alarms: frequencies activated upon arrival of the wave: * By order of detection |
0.7-8Hz, 1.5-4.5Hz, 10-49Hz, 1-5Hz0.5-2.5Hz, 0.01-0.05Hz |
| Place of Origin: | 38 km WNW of Bacnotan, Philippines |
| Geodetic coordinates of the epicenter: | 📍 16.8640°N 120.0270°E |
| Depth (hypocenter): | 35.0 km |
| Magnitude Richter Scale: | M5.4 |
| Modified Mercalli Scale Magnitude MMI => DYFI (Did You Feel It): | V |
| URL Official Data USGS: | https://earthquake.usgs.gov/earthquakes/eventpage/... |
| Unofficial data URL Volcano Discovery: | https://www.volcanodiscovery.com/es/sismos/informe... |
- GlobalQuake visualization software
Rafael Martín Soto - IT CEO / Artificial Intelligence
Rafael Martín Soto
Computer scientist by vocation. Organization of conventions, presentations, advanced studies in Artificial Intelligence and optimization of resources. More than 20 years of experience in server administration, web and cybersecurity. Lover of the use and optimization of natural resources, recycling and nature
Technical specialist in management informatics
View full profile of Rafael Martín Soto