The ground under South Karori, New Zealand — measured by the Global Seismographic Network (IRIS/USGS) station IU SNZO 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 |
|---|---|---|---|
| M5.3 | 46 km SSE of Otorohanga, New Zealand | 1970-01-01 00:00 UTC | 309 km |
| M5.0 | 4 km ENE of Inglewood, New Zealand | 1970-01-01 00:00 UTC | 244 km |
| M4.9 | Kermadec Islands region | 1970-01-01 00:00 UTC | 1,255 km |
| M4.9 | Auckland Islands, New Zealand region | 1970-01-01 00:00 UTC | 1,273 km |
| M4.6 | south of the Kermadec Islands | 1970-01-01 00:00 UTC | 1,122 km |
| M4.5 | south of the Kermadec Islands | 1970-01-01 00:00 UTC | 927 km |
| M4.5 | Kermadec Islands region | 1970-01-01 00:00 UTC | 1,218 km |
| M4.5 | Kermadec Islands, New Zealand | 1970-01-01 00:00 UTC | 1,433 km |
| M4.5 | Kermadec Islands, New Zealand | 1970-01-01 00:00 UTC | 1,432 km |
| M4.4 | 1970-01-01 00:00 UTC | 1,304 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 11,775 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 11,640 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 10,509 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 3,157 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 15,162 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 15,212 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.