Moderate mag. 4.9 earthquake - Philippine Sea, Japan, on Saturday, Jan 22, 2022 at 5:31 am (GMT +9) -
This quake was likely an aftershock of the 6.3 quake Philippine Sea, Japan, Jan 22, 2022 1:08 am (GMT +9), which had occurred 4 hours earlier.


Moderate magnitude 4.9 earthquake at 51 km depth
21 Jan 20:39 UTC: First to report: NIED after 7 minutes.
21 Jan 21:44: Now using data updates from USGS
21 Jan 21:44: Now using data updates from USGS
Local time at epicenter: Saturday, Jan 22, 2022 at 5:31 am (GMT +9)
Magnitude: 4.9
Depth: 50.6 km
Epicenter latitude / longitude: 32.699°N / 132.0166°E

Antipode: 32.699°S / 47.983°W
Nearest volcano: Kuju (83 km / 52 mi)
Nearby towns and cities:
780 km (485 mi) WSW of Tokyo (pop: 8,336,600) --> See nearby quakes!
101 km (63 mi) ENE of Kyūshū Island (pop: 13,232,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) | about seismic energy
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.
Mag. | Depth | Location | Source |
4.9 | 51 km | 29 Km SSE of Saiki, Japan | USGS |
4.9 | 55 km | SHIKOKU, JAPAN | EMSC |
5.1 | 730 km | Japan: Near Fukuoka | RENASS |
4.8 | 33 km | Shikoku, Japan | GFZ |
4.9 | 51 km | Shikoku, Japan | RaspberryShake |
4.9 | 36 km | Japan: HYUGANADA REGION | NIED |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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