The ground under Waverly, United States — measured by the Global Seismographic Network (IRIS/USGS) station IU WVT 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 |
|---|---|---|---|
| M3.5 | 1970-01-01 00:00 UTC | 1,419 km | |
| M3.3 | 1970-01-01 00:00 UTC | 1,480 km | |
| M3.2 | 1970-01-01 00:00 UTC | 1,266 km | |
| M3.1 | 1970-01-01 00:00 UTC | 1,371 km | |
| M3.1 | 1970-01-01 00:00 UTC | 1,363 km | |
| M3.0 | 1970-01-01 00:00 UTC | 1,481 km | |
| M2.9 | 1970-01-01 00:00 UTC | 1,425 km | |
| M2.9 | 1970-01-01 00:00 UTC | 1,496 km | |
| M2.8 | 1970-01-01 00:00 UTC | 899 km | |
| M2.8 | 1970-01-01 00:00 UTC | 1,215 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 3,253 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 12,395 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 8,365 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 12,404 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 8,112 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 8,035 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.