The ground under Taipei, Taiwan — measured by the Global Seismographic Network (IRIS/USGS) station IU TATO 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 | 75 km S of Yonakuni, Japan | 1970-01-01 00:00 UTC | 194 km |
| M5.3 | 44 km ESE of Miyazaki, Japan | 1970-01-01 00:00 UTC | 1,267 km |
| M5.2 | 68 km NE of Cabatuan, Philippines | 1970-01-01 00:00 UTC | 1,396 km |
| M4.9 | 35 km ESE of Hualien City, Taiwan | 1970-01-01 00:00 UTC | 132 km |
| M4.9 | 40 km ESE of Hualien City, Taiwan | 1970-01-01 00:00 UTC | 139 km |
| M4.9 | 70 km WNW of Callaguip, Philippines | 1970-01-01 00:00 UTC | 765 km |
| M4.8 | 10 km SE of Mamburao, Philippines | 1970-01-01 00:00 UTC | 1,316 km |
| M4.8 | 78 km WSW of San Nicolas, Philippines | 1970-01-01 00:00 UTC | 1,174 km |
| M4.8 | 109 km S of Koshima, Japan | 1970-01-01 00:00 UTC | 1,024 km |
| M4.8 | 165 km SSE of Miyakojima, Japan | 1970-01-01 00:00 UTC | 497 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 15,665 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 2,817 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 4,250 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 6,453 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 15,008 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 15,008 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.