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Major mag. 7.5 earthquake - Antigua And Barbuda Region, Leeward Islands (Antigua & Barbuda) on Tuesday, 8 October 1974

Major mag. 7.5 earthquake  - Antigua And Barbuda Region, Leeward Islands (Antigua & Barbuda) on Tuesday, 8 October 1974
Date & time: Tuesday, 8 October 1974 09:50 UTC
Magnitude: 7.5
Depth: 47.0 km
Epicenter latitude / longitude: 17.3°N / 62°W (Antigua & Barbuda)
Nearest volcano: Silver Hills (58 km / 36 mi)
Nearby towns and cities:
25 km (15 mi) NW of Cedar Grove (pop: 800)
26 km (16 mi) NW of Saint John’s (pop: 24,200)
29 km (18 mi) NW of Bolands (pop: 1,700)
123 km (76 mi) NW of Baie-Mahault (pop: 30,600)
126 km (78 mi) NW of Les Abymes (pop: 63,100)
133 km (83 mi) NW of Le Gosier (pop: 28,700)
Primary data source: USGS
Estimated released energy: 1.1 x 1016 joules (3117 gigawatt hours, equivalent to 2.7 x 106 tons of TNT or 167.6 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, 8 Oct 09:50 UTCM 7.5 / 47 kmAntigua And Barbuda Region, Leeward Islands (Antigua & Barbuda)USGS
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!

Aftershocks of the 7.5 quake: Antigua And Barbuda Region, Leeward Islands (Antigua & Barbuda), 8 Oct 1974 09:50

More info
Recorded aftershocks, latest first (24 quakes):
  • 20 Sep 1976 03:31 UTC
    | M 4.9 |
    51 km (31.7 mi) depth
    |
    116 km (72 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    7048 km (4380 mi) distance
    | | Details
  • 16 Aug 1976 23:41 UTC
    | M 4.9 |
    25 km (15.5 mi) depth
    |
    148 km (92 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    7048 km (4380 mi) distance
    | | Details
  • 15 Jul 1976 00:07 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    310 km (193 mi) distance
    | USGS | Details
  • 01 Jul 1976 03:38 UTC
    | M 5.1 |
    36 km (22.4 mi) depth
    |
    112 km (70 mi) distance
    | USGS | Details
  • 15 Jun 1976 10:05 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    |
    156 km (97 mi) distance
    | USGS | Details
  • 11 Jun 1976 03:41 UTC
    | M 5.3 |
    42 km (26.1 mi) depth
    |
    156 km (97 mi) distance
    | USGS | Details
  • 07 May 1976 05:36 UTC
    | M 4.8 |
    33 km (20.5 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    7048 km (4380 mi) distance
    | | Details
  • 10 Mar 1976 09:05 UTC
    | M 5.9 |
    77 km (47.8 mi) depth
    |
    110 km (69 mi) distance
    | USGS | Details
  • 03 Aug 1975 10:35 UTC
    | M 5.2 |
    35 km (21.7 mi) depth
    |
    291 km (181 mi) distance
    | USGS | Details
  • 05 Jul 1975 07:59 UTC
    | M 4.2 |
    33 km (20.5 mi) depth
    |
    300 km (186 mi) distance
    | USGS | Details
  • 25 May 1975 22:53 UTC
    | M 4.4 |
    33 km (20.5 mi) depth
    |
    296 km (184 mi) distance
    | USGS | Details
  • 03 Mar 1975 22:59 UTC
    | M 4.4 |
    33 km (20.5 mi) depth
    |
    118 km (73 mi) distance
    | USGS | Details
  • 03 Mar 1975 09:43 UTC
    | M 5.2 |
    39 km (24.2 mi) depth
    |
    105 km (65 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area since 1900

Major mag. 7.5 earthquake - Antigua And Barbuda Region, Leeward Islands (Antigua & Barbuda) on Tuesday, 8 October 1974

Map of earlier quakes

 

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