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Light mag. 4.1 earthquake - North Pacific Ocean, 16 km southeast of Tomakomai, Hokkaido, Japan, on Saturday, Jul 30, 2022 at 9:55 am (GMT +9) -

Light mag. 4.1 earthquake - North Pacific Ocean, 16 km southeast of Tomakomai, Hokkaido, Japan, on Saturday, Jul 30, 2022 at 9:55 am (GMT +9) Light mag. 4.1 earthquake - North Pacific Ocean, 16 km southeast of Tomakomai, Hokkaido, Japan, on Saturday, Jul 30, 2022 at 9:55 am (GMT +9)

Light magnitude 4.1 earthquake at 115 km depth

30 Jul 01:02 UTC: First to report: NIED after 6 minutes.
30 Jul 01:12: Now using data updates from USGS
Update Sat, 30 Jul 2022, 01:06

Moderate 4.1 quake hits near Tomakomai, Tomakomai Shi, Hokkaido, Japan

4.1 quake 30 Jul 9:55 am (GMT +9)
4.1 quake 30 Jul 9:55 am (GMT +9)
Just 10 minutes ago, a 4.1-magnitude earthquake struck near Tomakomai, Tomakomai Shi, Hokkaido, Japan. The tremor was recorded in the morning on Saturday, July 30th, 2022, at 9:55 am local time, at an intermediate depth of 134 km below the surface.
The event was filed by Japan's National Research Institute for Earth Science and Disaster Resilience (NIED), the first seismological agency to report it.
According to preliminary calculations, we do not expect that the quake was felt by many people and did not cause any damage. In Tomakomai (pop. 174,800, 21 km away), Chitose (pop. 92,900, 35 km away), Shiraoi (pop. 20,800, 37 km away), Shizunai-furukawachō (pop. 22,400, 51 km away), Kitahiroshima (pop. 62,400, 54 km away), Ebetsu (pop. 134,000, 69 km away), Muroran (pop. 96,200, 70 km away), Sapporo (pop. 1,883,000, 71 km away), and Iwamizawa (pop. 85,100, 76 km away), the quake was probably not felt.

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Earthquake details

Date & timeJul 30, 2022 00:55:39 UTC -
Local time at epicenterSaturday, Jul 30, 2022 at 9:55 am (GMT +9)
Depth114.7 km
Epicenter latitude / longitude42.5336°N / 141.746°E (North Pacific Ocean, Japan)
Antipode42.534°S / 38.254°W
Shaking intensityVery weak shaking
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoShikotsu (35 km / 22 mi)
Nearby towns and cities16 km (10 mi) SE of Tomakomai (pop: 174,800) | Show on map | Quakes nearby
33 km (20 mi) E of Shiraoi (pop: 20,800) | Show on map | Quakes nearby
33 km (20 mi) SSE of Chitose (pop: 92,900) | Show on map | Quakes nearby
51 km (32 mi) SSE of Kitahiroshima (pop: 62,400) | Show on map | Quakes nearby
66 km (41 mi) SSE of Ebetsu (pop: 134,000) | Show on map | Quakes nearby
67 km (41 mi) ENE of Muroran (pop: 96,200) | Show on map | Quakes nearby
68 km (42 mi) SSE of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby
782 km (486 mi) NNE of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
139 km (86 mi) SW of Hokkaido Island (pop: 5,500,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 22.1°C (72 F), humidity: 88%, wind: 3 m/s (7 kts) from S
Estimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) | about seismic energy
Show interactive Map
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
4.1115 km16 Km SE of Tomakomai, JapanUSGS
4.1115 kmHokkaido, Japan RegionRaspberryShake
4.1122 kmHokkaido, Japan RegionGFZ


Seismic station: Yuzhno Sakhalinsk, Russia (YSS/IU network) | Distance from quake: 499 km / 310 mi | Show on map | Station Info
Seismic station Yuzhno Sakhalinsk, Russia: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Earlier earthquakes in the same area

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