The ground under Funafuti, Tuvalu — measured by the Global Seismographic Network (IRIS/USGS) station IU FUNA 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 |
|---|---|---|---|
| M6.3 | 102 km NE of Norsup, Vanuatu | 1970-01-01 00:00 UTC | 1,428 km |
| M6.1 | 25 km ENE of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 1,481 km |
| M5.9 | Fiji region | 1970-01-01 00:00 UTC | 1,403 km |
| M5.5 | 122 km W of Neiafu, Tonga | 1970-01-01 00:00 UTC | 1,287 km |
| M5.5 | 55 km NNE of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 1,459 km |
| M5.5 | 283 km E of Levuka, Fiji | 1970-01-01 00:00 UTC | 1,126 km |
| M5.2 | 101 km NE of Norsup, Vanuatu | 1970-01-01 00:00 UTC | 1,430 km |
| M5.2 | 92 km NNE of Hihifo, Tonga | 1970-01-01 00:00 UTC | 1,105 km |
| M5.1 | 182 km SE of Lata, Solomon Islands | 1970-01-01 00:00 UTC | 1,387 km |
| M5.1 | 236 km E of Levuka, Fiji | 1970-01-01 00:00 UTC | 1,085 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 11,228 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 10,088 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 7,046 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 1,610 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 17,725 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 17,709 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.