   | |
| UTC time | 2013-05-24 05:44:48 |
|---|---|
| ISC event | 603007131 |
| USGS-ANSS | ComCat |
| Local date | 24 May 2013 (2013-05-24) |
| Local time | 15:44 |
| Magnitude | 8.3Mw[1] |
| Depth | 609 km (378 mi) |
| Epicenter | 54°53′31″N153°13′16″E / 54.892°N 153.221°E /54.892; 153.221 |
| Areas affected | Russia |
| Max. intensity | MMI V (Moderate) JMA 3 |
| Casualties | None |
The2013 Okhotsk Sea earthquake occurred with amoment magnitude of 8.3 at 15:44:49 local time (05:44:49UTC) on 24 May.[1] It had anepicenter in theSea of Okhotsk and affected primarily (but not only)Asian Russia, especially theKamchatka Peninsula where the shaking lasted for five minutes.[2]
The earthquake had amoment magnitude of 8.3 and was the largest to strikeRussia since2006. Due to its great depth of 609 km, it was not particularly intense at the surface, but was felt over a very large area. Such adeep-focus earthquake could be felt not only in areas surrounding the Okhotsk Sea but also in places as far asTokyo (JMA 1, about 2,400 km away from the epicenter),[3]Nanjing (more than 4,000 km away),[4]Atyrau (MMI V, about 7,200 km away),[5]Moscow (about 7,400 km away),[6] andBelgrade (about 8,100 km away).[7] Maximum recordedJMA intensity was Shindo 3 (equivalent to IV (Light) on theMMI Scale).
A related aftershock with a magnitude Mw 6.7 occurred at 02:56 local time (14:52UTC on 24 May), 9 hours after the earthquake, producing asupershear earthquake. It was an extremely deep (640 km or 400 mi) supershear as well as unusually fast at "eight kilometers per second (five miles per second), nearly 50 percent faster than the shear wave velocity at that depth".[8]
InMoscow, the shaking caused almost 900 residents to be evacuated from their homes.[9] In the city, small cracks appeared in several buildings.[7] InSamara, a poorly constructed house collapsed and seventeen others were slightly damaged, despite the shaking being so weak there.[7] InSaint Petersburg, one person had to be medically cared for in an office block due to nausea caused by the swaying building.[7] InYakutsk, 1,500 km from the epicenter, a bridge cracked.[7] InHeilongjiang,China, a school was evacuated due to the shaking.[7]
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