Strong mag. 6.2 earthquake - Tonga Islands on Tuesday, 7 April 2015

Strong mag. 6.4 earthquake - Tonga Islands on Tuesday, 7 April 2015 at 00:46 (GMT)

Strong mag. 6.4 earthquake  - Tonga Islands on Tuesday, 7 April 2015 at 00:46 (GMT)

Strong magnitude 6.4 earthquake at 10 km depth

7 Apr 01:10 UTC: First to report: GFZ after 24 minutes.
Apr 7 10:10: Magnitude recalculated from 6.3 to 6.4.
Date & time: 7 Apr 2015 12:46:18 UTC###AGESTRINGCOPY###
Magnitude: 6.4
Depth: 10.0 km
Epicenter latitude / longitude: 15.3°S / 173.37°W (Samoa)
Nearest volcano: West Mata (46 km / 29 mi)
Nearby towns and cities:
86 km (53 mi) NNE of Hihifo (Tonga) (pop: 815)
206 km (128 mi) SSW of Vailoa (pop: 769)
213 km (132 mi) SSW of Asau (pop: 6,640)
217 km (135 mi) SW of Mulifanua (pop: 4,510)
231 km (143 mi) SSW of Safotu (pop: 1,210)
234 km (145 mi) SW of Afega (Malie) (pop: 1,900)
237 km (148 mi) SW of Apia (pop: 40,400)
678 km (421 mi) NNE of Nuku‘alofa (Nuku'alofa, Tonga) (pop: 22,400)
Primary data source: GFZ
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.
MagnitudeDepthLocationSource
M 6.410 kmTonga IslandsGFZ
M 6.310 km TONGAEMSC
M 6.5 kmTonga IslandsGeoAu

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Tafuna (American Samoa, 314 km NE of epicenter) : Closet doors shook and bed shook (reported through EMSC)
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Aftershocks of the 6.4 quake Tonga Islands 7 April 00:46 UTC

More info
Recorded aftershocks, latest first (14 quakes):
  • 21 Aug 2015 06:56 UTC
    | M 4.8 |
    10 km (6.2 mi) depth
    |
    44 km (28 mi) distance
    | EMSC | Details
  • 07 Aug 2015 10:17 UTC
    | M 4.5 |
    32.7 km (20.3 mi) depth
    |
    57 km (36 mi) distance
    | USGS | Details
  • 28 Jul 2015 05:57 UTC
    | M 4.8 |
    30.5 km (19 mi) depth
    |
    64 km (40 mi) distance
    | USGS | Details
  • 08 Jul 2015 17:25 UTC
    | M 4.5 |
    10 km (6.2 mi) depth
    |
    74 km (46 mi) distance
    | EMSC | Details
  • 12 Jun 2015 11:07 UTC
    | M 6.0 |
    40 km (24.9 mi) depth
    |
    50 km (31 mi) distance
    | EMSC | Strong mag. 6.0 earthquake - TONGA on Friday, 12 June 2015 at 11:07 (GMT)
  • 11 Jun 2015 20:23 UTC
    | M 4.7 |
    38 km (23.6 mi) depth
    |
    62 km (38 mi) distance
    | EMSC | Details
  • 08 Jun 2015 15:01 UTC
    | M 5.4 |
    10 km (6.2 mi) depth
    |
    16 km (10 mi) distance
    | GFZ | Details
  • 30 May 2015 17:18 UTC
    | M 5.9 |
    69 km (42.9 mi) depth
    |
    54 km (34 mi) distance
    | GFZ | Details
  • 12 May 2015 10:03 UTC
    | M 5.0 |
    10 km (6.2 mi) depth
    |
    3 km (2 mi) distance
    | GFZ | Details
  • 09 May 2015 05:45 UTC
    | M 4.5 |
    34 km (21.1 mi) depth
    |
    30 km (19 mi) distance
    | EMSC | Details
  • 06 May 2015 09:33 UTC
    | M 4.5 |
    35 km (21.7 mi) depth
    |
    34 km (21 mi) distance
    | USGS | Details
  • 14 Apr 2015 08:13 UTC
    | M 5.7 |
    10 km (6.2 mi) depth
    |
    24 km (15 mi) distance
    | GFZ | Details
  • 12 Apr 2015 09:01 UTC
    | M 4.6 |
    29 km (18 mi) depth
    |
    37 km (23 mi) distance
    | EMSC | Details
  • 11 Apr 2015 10:07 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    69 km (43 mi) distance
    | EMSC | Details

Earlier earthquakes in the same area

Strong mag. 6.4 earthquake - Tonga Islands on Tuesday, 7 April 2015 at 00:46 (GMT)
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