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Major mag. 7.7 earthquake - Kermadec Islands Region (New Zealand) on Monday, 20 October 1986

Major mag. 7.7 earthquake  - Kermadec Islands Region (New Zealand) on Monday, 20 October 1986
Date & time: Monday, 20 October 1986 06:46 UTC
Magnitude: 7.7
Depth: 29.1 km
Epicenter latitude / longitude: 28.117°S / 176.367°W (New Zealand)
Nearest volcano: Putoto (127 km / 79 mi)
Primary data source: USGS
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!) [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
Mon, 20 Oct 06:46 UTCM 7.7 / 29.1 kmKermadec Islands Region (New Zealand)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 7.7 quake: Kermadec Islands Region (New Zealand), 20 Oct 1986 06:46

More info
Recorded aftershocks, latest first (137 quakes):
  • 10 Oct 1988 18:20 UTC
    | M 6.3 |
    27.7 km (17.2 mi) depth
    |
    130 km (81 mi) distance
    | USGS | Strong mag. 6.3 earthquake - Kermadec Islands Region (New Zealand) on Monday, 10 October 1988
  • 26 Sep 1988 21:07 UTC
    | M 5.6 |
    33 km (20.5 mi) depth
    |
    208 km (129 mi) distance
    | USGS | Details
  • 08 Sep 1988 12:48 UTC
    | M 5.4 |
    33 km (20.5 mi) depth
    |
    213 km (132 mi) distance
    | USGS | Details
  • 16 Jul 1988 16:55 UTC
    | M 5.7 |
    30.1 km (18.7 mi) depth
    |
    100 km (62 mi) distance
    | USGS | Details
  • 05 Jun 1988 17:29 UTC
    | M 5.0 |
    70 km (43.5 mi) depth
    |
    136 km (84 mi) distance
    | USGS | Details
  • 18 May 1988 21:50 UTC
    | M 5.1 |
    239.6 km (148.9 mi) depth
    |
    205 km (127 mi) distance
    | USGS | Details
  • 09 May 1988 12:22 UTC
    | M 5.4 |
    53.6 km (33.3 mi) depth
    |
    246 km (153 mi) distance
    | USGS | Details
  • 11 Apr 1988 23:00 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    167 km (104 mi) distance
    | USGS | Details
  • 23 Mar 1988 13:43 UTC
    | M 5.5 |
    161.9 km (100.6 mi) depth
    |
    138 km (86 mi) distance
    | USGS | Details
  • 23 Mar 1988 05:07 UTC
    | M 5.3 |
    33 km (20.5 mi) depth
    |
    64 km (39 mi) distance
    | USGS | Details
  • 13 Feb 1988 15:05 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    251 km (156 mi) distance
    | USGS | Details
  • 12 Jan 1988 07:29 UTC
    | M 6.6 |
    14.8 km (9.2 mi) depth
    |
    130 km (81 mi) distance
    | USGS | Strong mag. 6.6 earthquake - Kermadec Islands Region (New Zealand) on Tuesday, 12 January 1988
  • 30 Dec 1987 20:19 UTC
    | M 5.4 |
    104.4 km (64.9 mi) depth
    |
    170 km (106 mi) distance
    | USGS | Details
  • 10 Dec 1987 22:24 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    249 km (155 mi) distance
    | USGS | Details
  • 08 Nov 1987 04:38 UTC
    | M 5.0 |
    71.7 km (44.6 mi) depth
    |
    123 km (76 mi) distance
    | USGS | Details
  • 01 Nov 1987 10:01 UTC
    | M 5.0 |
    42.3 km (26.3 mi) depth
    |
    235 km (146 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

Major mag. 7.7 earthquake - Kermadec Islands Region (New Zealand) on Monday, 20 October 1986
 

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