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Strong mag. 5.5 earthquake - North Pacific Ocean, 62 km southeast of Chichijima Island, Japan, on Friday, 11 June 2010 at 16:58 (GMT)
Strong magnitude 5.5 earthquake at 10 km depth
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Date & time: 11 Jun 2010 16:58:36 UTC
Magnitude: 5.5Depth: 10.0 km
Epicenter latitude / longitude: 26.712°N / 142.688°E
(
North Pacific Ocean,
Japan)
Nearest volcano:
Kaikata (168 km / 104 mi)
Nearby towns and cities:62 km (38 mi) SE of Chichijima Island (pop: 2,000) -->
See nearby quakes!Primary data source:
USGS (United States Geological Survey)
Estimated released energy: 1.1 x 10
13 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!)
More info[show 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.
| Magnitude | Depth | Location | Source |
| M 5.5 | 10 km | Bonin Islands, Japan region | USGS |
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.
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Aftershocks
More info
Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. 32 km
2 (=12 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 10 km (6 mi).
Aftershocks typically occur during the days and weeks following the quake at or near the same fault, at distances of up to approx. two times the length of the rupture zone.
The often broadly linear arrangement of aftershock epicenters encompasses the rupture zone of the main shock (check on the
map below to verify).
22 Jun 2010 23:42 UTC
| M 4.3 | 25.8 km (16 mi) depth
| 23 km (14 mi) distance
| USGS | Details13 Jun 2010 03:09 UTC
| M 4.4 | 27.6 km (17.1 mi) depth
| 20 km (12 mi) distance
| USGS | Details11 Jun 2010 17:09 UTC
| M 4.7 | 12.4 km (7.7 mi) depth
| 26 km (16 mi) distance
| USGS | Details11 Jun 2010 17:03 UTC
| M 4.9 | 23.6 km (14.7 mi) depth
| 20 km (13 mi) distance
| USGS | Details
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