The ground under Davao, Philippines — measured by the Global Seismographic Network (IRIS/USGS) station IU DAV and redrawn here every 15 minutes. A thin band means a quiet ground; a tall spike is a passing earthquake, near or on the other side of the planet.
| Mag | Where | When | Distance |
|---|---|---|---|
| M5.5 | 13 km SW of Burias, Philippines | 1970-01-01 00:00 UTC | 167 km |
| M5.3 | 42 km WSW of Palimbang, Philippines | 1970-01-01 00:00 UTC | 224 km |
| M5.3 | 159 km WNW of Tobelo, Indonesia | 1970-01-01 00:00 UTC | 532 km |
| M5.2 | 117 km SE of Bitung, Indonesia | 1970-01-01 00:00 UTC | 703 km |
| M5.2 | 149 km W of Gorontalo, Indonesia | 1970-01-01 00:00 UTC | 844 km |
| M5.2 | 68 km NE of Cabatuan, Philippines | 1970-01-01 00:00 UTC | 663 km |
| M5.2 | 6 km NW of Balangonan, Philippines | 1970-01-01 00:00 UTC | 165 km |
| M5.1 | 127 km E of Bitung, Indonesia | 1970-01-01 00:00 UTC | 633 km |
| M5.1 | 7 km N of Balangonan, Philippines | 1970-01-01 00:00 UTC | 161 km |
| M5.0 | 43 km NNE of Semporna, Malaysia | 1970-01-01 00:00 UTC | 793 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 16,669 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 4,326 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 5,771 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 4,997 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 16,065 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 16,098 km |
Waves from a large earthquake reach this station minutes later — up to about 20 minutes from the far side of the Earth. Look for a spike in the helicorder at that time.