The ground under Magadan, Russia — measured by the Global Seismographic Network (IRIS/USGS) station IU MA2 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 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 936 km |
| M5.8 | 275 km SSW of Severo-Kuril’sk, Russia | 1970-01-01 00:00 UTC | 1,277 km |
| M5.7 | 152 km SE of Vilyuchinsk, Russia | 1970-01-01 00:00 UTC | 1,027 km |
| M5.3 | 101 km SSE of Vilyuchinsk, Russia | 1970-01-01 00:00 UTC | 976 km |
| M5.2 | 101 km SSW of Severo-Kuril’sk, Russia | 1970-01-01 00:00 UTC | 1,134 km |
| M5.1 | 169 km SE of Petropavlovsk-Kamchatsky, Russia | 1970-01-01 00:00 UTC | 1,029 km |
| M5.0 | 173 km SSE of Vilyuchinsk, Russia | 1970-01-01 00:00 UTC | 1,049 km |
| M5.0 | 205 km SSE of Vilyuchinsk, Russia | 1970-01-01 00:00 UTC | 1,079 km |
| M4.9 | 143 km SE of Petropavlovsk-Kamchatsky, Russia | 1970-01-01 00:00 UTC | 1,002 km |
| M4.9 | 130 km SE of Petropavlovsk-Kamchatsky, Russia | 1970-01-01 00:00 UTC | 991 km |
| Mag | Where | When | Distance |
|---|---|---|---|
| M7.7 | 12 km WSW of Pitaloza Arriba, Panama | 1970-01-01 00:00 UTC | 11,279 km |
| M7.0 | 191 km ENE of Nagqu, China | 1970-01-01 00:00 UTC | 5,114 km |
| M6.9 | 76 km NE of Ozernovskiy, Russia | 1970-01-01 00:00 UTC | 936 km |
| M6.9 | 197 km WNW of Port-Olry, Vanuatu | 1970-01-01 00:00 UTC | 8,296 km |
| M6.8 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 13,381 km |
| M6.7 | central Mid-Atlantic Ridge | 1970-01-01 00:00 UTC | 13,322 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.