Seismic activity – The Watchers

Strong and shallow M6.3 earthquake hits near South Island, New Zealand

Teo Blašković — Mon, 07 Jul 2025 13:37:16 +0000

A strong and shallow earthquake registered by the USGS as M6.3 hit near the southern coast of South Island, New Zealand at 12:53 UTC on July 7, 2025. The agency is reporting a depth of 10 km (6.2 miles). GeoNet is reporting M6.1 at a depth of 12 km (7.5 miles).

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Japan updates ‘megaquake’ preparedness plan following revised risk for Nankai Trough earthquake

Reet Kaur — Fri, 04 Jul 2025 14:54:53 +0000

The Japanese government announced this week that much more must be done to prepare for a possible Nankai Trough “megaquake,” after a government panel raised the 30-year probability of a major event to up to 82 percent and new estimates projected as many as 298 000 fatalities and damages of up to USD 2 trillion.

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Authorities urge evacuation of Akusekijima as over 1 000 earthquakes rattle Tokara Islands, Japan

Rishav Kothari — Thu, 03 Jul 2025 19:51:00 +0000

Japanese authorities urged residents of Akusekijima Island to evacuate after another strong earthquake struck the region on July 3, 2025, the latest in a series of more than 1 000 quakes recorded since June 21.

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Ridge of Pennata islet collapses after the strongest earthquake in 40 years strikes Campi Flegrei, Italy

Rishav Kothari — Mon, 30 Jun 2025 18:04:47 +0000

An earthquake swarm with the strongest quake registered as an M4.6 quake struck the Campi Flegrei area in southern Italy on June 30, 2025, prompting evacuations and train delays in the region. It was the strongest tremor to strike the region in 40 years, surpassing the M4.4 quakes of March and May.

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Strong and shallow M6.6 earthquake hits Scotia Sea

Rishav Kothari — Sat, 28 Jun 2025 10:45:40 +0000

A strong earthquake registered by the USGS as an M6.6 struck the Scotia Sea at 08:32 UTC on June 28, 2025. The agency reports a depth of 10 km (6.2 miles). EMSC is reporting the same magnitude and depth.

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Strong M6.1 earthquake hits near the coast of Philippines

Teo Blašković — Sat, 28 Jun 2025 08:00:22 +0000

A strong earthquake registered by the USGS as M6.1 hit near the coast of the Philippines at 23:07 UTC on June 27, 2025. The agency is reporting a depth of 101 km (63 miles). EMSC is reporting the same magnitude and depth. PHIVOLCS is reporting M6.1 at a depth of 85 km (53 miles).

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More than 470 earthquakes recorded in the Tokara Islands, Japan

Harsh Vardhan — Thu, 26 Jun 2025 16:02:00 +0000

An ongoing earthquake swarm in the Tokara Islands, southern Japan, has produced 474 tremors since June 21, 2025, with events reaching magnitudes up to M5.1 and a maximum local Japanese shindo intensity of 4.

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Strong M6.2 earthquake hits southern Mid-Atlantic Ridge

Teo Blašković — Thu, 26 Jun 2025 00:36:00 +0000

A strong earthquake registered by the USGS as M6.2 hit the southern Mid-Atlantic Ridge at 22:16 UTC on June 25, 2025. The agency is reporting a depth of 10 km (6.2 miles).

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Strong and shallow M6.2 earthquake hits east of the Philippine Islands

Teo Blašković — Tue, 24 Jun 2025 09:10:54 +0000

A strong and shallow earthquake registered by the USGS as M6.2 hit east of the Philippine Islands at 01:58 UTC (09:58 local time) on June 24, 2025. The agency is reporting a depth of 5 km (3.1 miles). Philippine Institute of Volcanology and Seismology (PHIVOLCS) is reporting M6.3 at a depth of 34 km (21 miles).

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Shallow M5.9 earthquake hits off the coast of Hokkaido, Japan

Teo Blašković — Sat, 21 Jun 2025 22:16:37 +0000

A shallow earthquake registered by the Japan Meteorological Agency (JMA) as M5.9 hit off the coast of Nemuro Peninsula, Hokkaido, at 21:23 UTC on June 21 (06:23 JST, June 22), 2025. The agency is reporting a depth of 20 km (12.4 miles). USGS is reporting M6.1 at a depth of 10 km (6.2 miles).

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