Major magnitude 7.7 earthquake - North Pacific Ocean, 28 mi south of Hilo, Hawaii County, USA, on Saturday, November 29, 1975 at 14:47 (GMT)

Major magnitude 7.7 earthquake - North Pacific Ocean, 28 mi south of Hilo, Hawaii County, USA, on Saturday, November 29, 1975 at 14:47 (GMT)

Major magnitude 7.7 earthquake at 9 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Nov 29, 1975 14:47:40 UTC
Magnitude: 7.7
Depth: 8.6 km
Epicenter latitude / longitude: 19.333°N / 155.0015°W (North Pacific Ocean, Hawaii, United States)
Antipode: 19.333°S / 24.999°E
Nearest volcano: Kilauea (31 km / 19 mi)
Nearby towns and cities:
19 km (12 mi) SSW of Pahoa (pop: 945) --> See nearby quakes!
27 km (17 mi) SSE of Mountain View (pop: 3,920) --> See nearby quakes!
27 km (17 mi) ESE of Volcano Village (pop: 2,580) --> See nearby quakes!
29 km (18 mi) S of Hawaiian Paradise Park (Hawaii County) (pop: 11,400) --> See nearby quakes!
45 km (28 mi) SSE of Hilo (pop: 43,300) --> See nearby quakes!
52 km (32 mi) ENE of Pāhala (pop: 1,360) --> See nearby quakes!
57 km (35 mi) SSE of Pepeekeo (pop: 1,790) --> See nearby quakes!
85 km (53 mi) ENE of Hawaiian Ocean View (pop: 4,440) --> See nearby quakes!
357 km (222 mi) SE of East Honolulu (pop: 49,900) --> See nearby quakes!
370 km (230 mi) SE of Honolulu (pop: 371,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.2 x 1016 joules (6219 gigawatt hours, equivalent to 5.4 x 106 tons of TNT or 334.4 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
7.78.6 kmHawaii region, Hawaii (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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Aftershocks

More info

Recorded aftershocks, latest first (8192 quakes)

  • 30 Nov 1977 13:29 UTC
    | M 2.2 |
    0.8 km (0.5 mi) depth
    |
    31 km (19 mi) distance
    | USGS | Details
  • 30 Nov 1977 11:38 UTC
    | M 2.2 |
    8.4 km (5.2 mi) depth
    |
    44 km (27 mi) distance
    | USGS | Details
  • 29 Nov 1977 22:46 UTC
    | M 2.1 |
    2.1 km (1.3 mi) depth
    |
    28 km (17 mi) distance
    | USGS | Details
  • 29 Nov 1977 22:11 UTC
    | M 2.1 |
    2.1 km (1.3 mi) depth
    |
    28 km (17 mi) distance
    | USGS | Details
  • 29 Nov 1977 19:26 UTC
    | M 2.4 |
    34.1 km (21.2 mi) depth
    |
    32 km (20 mi) distance
    | USGS | Details
  • 29 Nov 1977 10:38 UTC
    | M 2.4 |
    6.5 km (4 mi) depth
    |
    86 km (54 mi) distance
    | USGS | Details
  • 29 Nov 1977 09:03 UTC
    | M 2.3 |
    33.4 km (20.8 mi) depth
    |
    32 km (20 mi) distance
    | USGS | Details
  • 29 Nov 1977 08:03 UTC
    | M 2.9 |
    9.4 km (5.8 mi) depth
    |
    19 km (12 mi) distance
    | USGS | Details
  • 28 Nov 1977 23:42 UTC
    | M 2.4 |
    7.3 km (4.5 mi) depth
    |
    5 km (3 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    16549 km (10283 mi) distance
    | | Details
  • 28 Nov 1977 21:37 UTC
    | M 2.1 |
    7.5 km (4.7 mi) depth
    |
    11 km (7 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    16549 km (10283 mi) distance
    | | Details
  • 28 Nov 1977 16:45 UTC
    | M 2.5 |
    47.3 km (29.4 mi) depth
    |
    38 km (23 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    16549 km (10283 mi) distance
    | | Details
  • 28 Nov 1977 08:08 UTC
    | M 1.9 |
    5.1 km (3.2 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    16549 km (10283 mi) distance
    | | Details
  • Show all