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Major mag. 7.4 earthquake - South Sandwich Islands Region on Tuesday, 11 December 2018 - information

Major mag. 7.4 earthquake - South Sandwich Islands Region on Tuesday, 11 December 2018

Major mag. 7.4 earthquake  - South Sandwich Islands Region on Tuesday, 11 December 2018
11 Dec 02:34 UTC: First to report: GFZ after 8 minutes.
Dec 11 02:35: Magnitude recalculated from 7.4 to 7.5.
Dec 11 02:38: Magnitude recalculated from 7.5 to 7.4.
Date & time: Tuesday, 11 December 2018 02:26 UTC
Magnitude: 7.4
Depth: 10.0 km
Epicenter latitude / longitude: 58.22°S / 26.32°W (South Georgia & South Sandwich Islands)
Nearest volcano: Montagu Island (22 km / 14 mi)
Primary data source: GFZ
Estimated released energy: 7.9 x 1015 joules (2206 gigawatt hours, equivalent to 1.9 x 106 tons of TNT or 118.7 atomic bombs!) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
TimeMag. / DepthLocationSource
Tue, 11 Dec 02:26 UTCM 7.4 / 10 kmSouth Sandwich Islands RegionGFZ
Tue, 11 Dec 02:26 UTCM 7.1 / 150 km SOUTH SANDWICH ISLANDS REGIONEMSC
2018-12-11 00:26:17 -02:00 (11 Dec 02:26:17 UTC)M 7.3 / 176 km- 61km NNE of Bristol Island, South Sandwich IslandsUSGS
2018-12-11 00:26:32 -02:00 (11 Dec 02:26:32 UTC)M 7.1 / 164.7 km- 48km N of Bristol Island, South Sandwich IslandsUSGS

User reports for this quake (13)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
13764.7 km WNW of epicenter [Map] / Very strong shaking (MMI VII)
atlanta, ga / Very weak shaking (MMI II)
san diego california / not felt
Düsseldorf / not felt
Cincinnati, OH / not felt : I didn't feel this earthquake
Sorocaba / not felt
Santa Cruz da Serra, Duque de Caxias, RJ, Brasil / not felt
Lisbon / not felt
4234.8 km WNW of epicenter [Map] / not felt : Estamos lejos.... (reported through our app)
jogjakarta / Violent shaking (MMI IX) : Sampe roboh kandang jangkrik saya
animales inquietos (4047.8 km NW of epicenter) [Map] / not felt (reported through our app)
Russia. Sankt-Peterburg.not felt. / not felt : Frim.Russia.from Sankt-Peterburg_!!! not felt_!!! Всё спокойно, тихо
Russia. Sankt-Peterburg.not felt. / not felt : From Russia, from Sankt-Peterburg.not felt_!!! Всё

Aftershocks of the 7.4 quake: South Sandwich Islands Region, 11 Dec 2018 02:26

More info
Recorded aftershocks, latest first (142 quakes):
  • 15 Sep 2020 14:03 UTC
    | M 4.5 |
    36.4 km (22.6 mi) depth
    |
    163 km (102 mi) distance
    | USGS | Details
  • 13 Sep 2020 20:45 UTC
    | M 4.7 |
    84.1 km (52.3 mi) depth
    |
    162 km (101 mi) distance
    | USGS | Details
  • 13 Sep 2020 01:00 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    76 km (47 mi) distance
    | USGS | Details
  • 03 Sep 2020 22:52 UTC
    | M 4.9 |
    10 km (6.2 mi) depth
    |
    242 km (150 mi) distance
    | USGS | Details
  • 02 Sep 2020 00:21 UTC
    | M 5.1 |
    115 km (71.5 mi) depth
    |
    249 km (155 mi) distance
    | USGS | Details
  • 02 Sep 2020 00:21 UTC
    | M 5.2 |
    59.7 km (37.1 mi) depth
    |
    267 km (166 mi) distance
    | GeoAu | Details
  • 31 Aug 2020 23:16 UTC
    | M 4.8 |
    10 km (6.2 mi) depth
    |
    95 km (59 mi) distance
    | USGS | Details
  • 20 Aug 2020 21:22 UTC
    | M 5.0 |
    41.3 km (25.7 mi) depth
    |
    259 km (161 mi) distance
    | USGS | Details
  • 16 Aug 2020 01:44 UTC
    | M 5.1 |
    77 km (47.8 mi) depth
    |
    168 km (104 mi) distance
    | EMSC | Details
  • 16 Aug 2020 01:44 UTC
    | M 5.1 |
    76.6 km (47.6 mi) depth
    |
    168 km (105 mi) distance
    | USGS | Details
  • 29 Jul 2020 16:36 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    198 km (123 mi) distance
    | USGS | Details
  • 29 Jul 2020 10:00 UTC
    | M 5.0 |
    60.4 km (37.5 mi) depth
    |
    164 km (102 mi) distance
    | USGS | Details
  • 26 Jul 2020 03:59 UTC
    | M 5.1 |
    10 km (6.2 mi) depth
    |
    273 km (170 mi) distance
    | GeoAu | Details
  • 26 Jul 2020 00:54 UTC
    | M 6.4 |
    10 km (6.2 mi) depth
    |
    301 km (187 mi) distance
    | GFZ | Strong mag. 6.4 earthquake - South Sandwich Islands Region on Sunday, 26 July 2020
  • 20 Jul 2020 23:07 UTC
    | M 5.1 |
    74 km (46 mi) depth
    |
    43 km (27 mi) distance
    | GFZ | Details
  • 15 Jul 2020 08:56 UTC
    | M 4.8 |
    35 km (21.7 mi) depth
    |
    157 km (97 mi) distance
    | EMSC | Details
  • Show all

Earlier earthquakes in the same area

Major mag. 7.4 earthquake - South Sandwich Islands Region on Tuesday, 11 December 2018

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