The ground under Honiara, Solomon Islands — measured by the Global Seismographic Network (IRIS/USGS) station IU HNR 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 |
|---|---|---|---|
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 797 km |
| M6.3 | 102 km NE of Norsup, Vanuatu | 1970-01-01 00:00 UTC | 1,123 km |
| M6.3 | 197 km NW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 796 km |
| M6.3 | 170 km NW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 823 km |
| M6.2 | 86 km SSE of Panguna, Papua New Guinea | 1970-01-01 00:00 UTC | 533 km |
| M6.1 | 25 km ENE of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 1,010 km |
| M6.0 | 128 km S of Kokopo, Papua New Guinea | 1970-01-01 00:00 UTC | 965 km |
| M6.0 | 186 km NW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 808 km |
| M6.0 | 214 km NW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 780 km |
| M5.9 | 196 km NW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 797 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 13,343 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 8,406 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 6,834 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 797 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 18,918 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 18,984 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.