Very strong mag. 6.4 earthquake - Indian Ocean, 55 km south of Singkil, Aceh, Indonesia, on Saturday, 16 April 2005 at 16:38 (GMT)

Very strong mag. 6.4 earthquake - Indian Ocean, 55 km south of Singkil, Aceh, Indonesia, on Saturday, 16 April 2005 at 16:38 (GMT)

Very strong magnitude 6.4 earthquake at 31 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: 16 Apr 2005 16:38:03 UTC
Magnitude: 6.4
Depth: 31.0 km
Epicenter latitude / longitude: 1.812°N / 97.662°E (Indian Ocean, Indonesia)
Nearest volcano: Toba (143 km / 89 mi)
Nearby towns and cities:
55 km (34 mi) SSW of Singkil (pop: 46,800) --> See nearby quakes!
125 km (77 mi) W of Sibolga (pop: 79,700) --> See nearby quakes!
170 km (106 mi) SSW of Kabanjahe (pop: 57,200) --> See nearby quakes!
185 km (115 mi) WNW of Padangsidempuan (pop: 100,600) --> See nearby quakes!
202 km (125 mi) SW of Pematangsiantar (pop: 209,600) --> See nearby quakes!
219 km (136 mi) SSW of Binjai (pop: 228,800) --> See nearby quakes!
223 km (139 mi) SSW of Sunggal (pop: 157,900) --> See nearby quakes!
226 km (141 mi) SSW of Medan (pop: 1,751,000) --> See nearby quakes!
429 km (267 mi) NW of Padang (pop: 840,400) --> See nearby quakes!
471 km (293 mi) WSW of Kuala Lumpur (Malaysia) (pop: 1,454,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 atomic bombs!) More info
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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.
Mag.DepthLocationSource
6.431 kmNias region, IndonesiaUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

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 yet. If you felt it be the first to report it!
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Aftershocks

More info
Recorded aftershocks, latest first (270 quakes):
  • 09 Oct 2005 22:28 UTC
    | M 4.9 |
    30 km (18.6 mi) depth
    |
    30 km (18 mi) distance
    | USGS | Details
  • 08 Oct 2005 04:30 UTC
    | M 5.6 |
    30 km (18.6 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 07 Oct 2005 09:15 UTC
    | M 4.5 |
    30 km (18.6 mi) depth
    |
    69 km (43 mi) distance
    | USGS | Details
  • 07 Oct 2005 01:47 UTC
    | M 4.1 |
    30 km (18.6 mi) depth
    |
    87 km (54 mi) distance
    | USGS | Details
  • 03 Oct 2005 00:58 UTC
    | M 5.2 |
    23.7 km (14.7 mi) depth
    |
    91 km (57 mi) distance
    | USGS | Details
  • 02 Oct 2005 07:13 UTC
    | M 4.2 |
    30 km (18.6 mi) depth
    |
    47 km (29 mi) distance
    | USGS | Details
  • 24 Sep 2005 22:25 UTC
    | M 4.4 |
    30 km (18.6 mi) depth
    |
    86 km (54 mi) distance
    | USGS | Details
  • 23 Sep 2005 05:18 UTC
    | M 4.2 |
    30 km (18.6 mi) depth
    |
    88 km (55 mi) distance
    | USGS | Details
  • 21 Sep 2005 07:23 UTC
    | M 4.6 |
    28.3 km (17.6 mi) depth
    |
    79 km (49 mi) distance
    | USGS | Details
  • 19 Sep 2005 14:34 UTC
    | M 4.9 |
    30 km (18.6 mi) depth
    |
    76 km (47 mi) distance
    | USGS | Details
  • 18 Sep 2005 21:45 UTC
    | M 4.3 |
    27 km (16.8 mi) depth
    |
    59 km (37 mi) distance
    | USGS | Details
  • 18 Sep 2005 10:12 UTC
    | M 4.1 |
    30 km (18.6 mi) depth
    |
    89 km (55 mi) distance
    | USGS | Details
  • 17 Sep 2005 10:33 UTC
    | M 4.3 |
    30 km (18.6 mi) depth
    |
    93 km (58 mi) distance
    | USGS | Details
  • 10 Sep 2005 02:49 UTC
    | M 4.8 |
    30 km (18.6 mi) depth
    |
    79 km (49 mi) distance
    | USGS | Details
  • 09 Sep 2005 23:47 UTC
    | M 4.9 |
    22.9 km (14.2 mi) depth
    |
    86 km (54 mi) distance
    | USGS | Details
  • 09 Sep 2005 05:39 UTC
    | M 4.9 |
    24.2 km (15 mi) depth
    |
    80 km (50 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

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