The ground under BBSR, Bermuda — measured by the Global Seismographic Network (IRIS/USGS) station IU BBSR 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 |
|---|---|---|---|
| M3.7 | 1970-01-01 00:00 UTC | 1,428 km | |
| M3.6 | 1970-01-01 00:00 UTC | 1,488 km | |
| M3.6 | 1970-01-01 00:00 UTC | 1,437 km | |
| M3.6 | 1970-01-01 00:00 UTC | 1,461 km | |
| M3.5 | 1970-01-01 00:00 UTC | 1,474 km | |
| M3.4 | 1970-01-01 00:00 UTC | 1,477 km | |
| M3.4 | 1970-01-01 00:00 UTC | 1,483 km | |
| M3.4 | 1970-01-01 00:00 UTC | 1,469 km | |
| M3.4 | 1970-01-01 00:00 UTC | 1,499 km | |
| M3.3 | 1970-01-01 00:00 UTC | 1,498 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 3,217 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 12,469 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 9,785 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 14,549 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 5,982 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 5,904 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.