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Strong mag. 5.1 earthquake - Norwegian Sea on Tuesday, 13 April 1999 at 02:09 (GMT)
Strong magnitude 5.1 earthquake at 10 km depth
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Date & time: 13 Apr 1999 02:09:22 UTC
Magnitude: 5.1Depth: 10.0 km
Epicenter latitude / longitude: 73.215°N / 6.65°E
(international territory)
Nearby towns and cities:565 km (351 mi) NW of Gryllefjord (Norway) (pop: 439) -->
See nearby quakes!575 km (357 mi) NW of Ersfjord (Norway) (pop: 306) -->
See nearby quakes!587 km (365 mi) NW of Tromsø (Norway) (pop: 52,400) -->
See nearby quakes!627 km (389 mi) NW of Lyngseidet (Norway) (pop: 821) -->
See nearby quakes!629 km (391 mi) NW of Storsteinnes (Norway) (pop: 890) -->
See nearby quakes!Primary data source:
USGS (United States Geological Survey)
Estimated released energy: 2.8 x 10
12 joules (783 megawatt hours, equivalent to 674 tons of TNT)
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 5.1 | 10 km | Greenland Sea | 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. 13 km
2 (=5 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 6 km (4 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).
10 Jun 1999 14:00 UTC
| M 4.2 | 10 km (6.2 mi) depth
| 20 km (13 mi) distance
| USGS | Details10 Jun 1999 07:48 UTC
| M 4.2 | 10 km (6.2 mi) depth
| 8 km (5 mi) distance
| USGS | Details07 Jun 1999 13:04 UTC
| M 4.0 | 10 km (6.2 mi) depth
| 8 km (5 mi) distance
| USGS | Details07 Jun 1999 12:54 UTC
| M 4.5 | 10 km (6.2 mi) depth
| 17 km (11 mi) distance
| USGS | Details02 Jun 1999 00:31 UTC
| M 4.9 | 10 km (6.2 mi) depth
| 18 km (11 mi) distance
| USGS | Details
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