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Major mag. 7.7 earthquake - Santa Cruz Islands (Vanuatu) on Monday, 21 April 1997

Major mag. 7.7 earthquake  - Santa Cruz Islands (Vanuatu) on Monday, 21 April 1997
Date & time: Monday, 21 April 1997 12:02 UTC
Magnitude: 7.7
Depth: 33.0 km
Epicenter latitude / longitude: 12.584°S / 166.676°E (Vanuatu)
Nearest volcano: Ureparapara (126 km / 78 mi)
Nearby towns and cities:
172 km (107 mi) NW of Sola (pop: 1,200)
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
Thu, 1 Jan 00:00 UTCM
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) scale.
There are no user reports for this quake yet. If you felt it or were nearby when it occurred, be the first to report it!

Aftershocks of the 7.7 quake: Santa Cruz Islands (Vanuatu), 21 Apr 1997 12h02

Show info about this
List of recorded aftershocks, latest first (85 quakes):
  • 23 Feb 1999 11:45 UTC
    | M 5.4 |
    83.6 km (51.9 mi) depth
    |
    21 km (13 mi) distance
    | USGS | Details
  • 13 Feb 1999 08:17 UTC
    | M 5.1 |
    89.8 km (55.8 mi) depth
    |
    11 km (7 mi) distance
    | USGS | Details
  • 10 Feb 1999 04:32 UTC
    | M 5.3 |
    77.3 km (48 mi) depth
    |
    27 km (17 mi) distance
    | USGS | Details
  • 06 Feb 1999 21:47 UTC
    | M 7.3 |
    90.1 km (56 mi) depth
    |
    30 km (19 mi) distance
    | USGS | Major mag. 7.3 earthquake - Santa Cruz Islands (Vanuatu) on Saturday, 6 February 1999
  • 05 Feb 1999 11:39 UTC
    | M 5.9 |
    213 km (132.4 mi) depth
    |
    32 km (20 mi) distance
    | USGS | Details
  • 14 Dec 1998 19:35 UTC
    | M 6.0 |
    139.9 km (86.9 mi) depth
    |
    284 km (176 mi) distance
    | USGS | Strong mag. 6.0 earthquake - Vanuatu on Monday, 14 December 1998
  • 14 Nov 1998 15:03 UTC
    | M 6.0 |
    115.1 km (71.5 mi) depth
    |
    273 km (170 mi) distance
    | USGS | Strong mag. 6.0 earthquake - Vanuatu on Saturday, 14 November 1998
  • 27 Oct 1998 06:55 UTC
    | M 5.1 |
    33 km (20.5 mi) depth
    |
    262 km (163 mi) distance
    | USGS | Details
  • 17 Oct 1998 12:41 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    178 km (111 mi) distance
    | USGS | Details
  • 15 Oct 1998 12:48 UTC
    | M 5.4 |
    43 km (26.7 mi) depth
    |
    118 km (73 mi) distance
    | USGS | Details
  • 21 Sep 1998 12:09 UTC
    | M 6.4 |
    33 km (20.5 mi) depth
    |
    111 km (69 mi) distance
    | USGS | Strong mag. 6.4 earthquake - Vanuatu on Monday, 21 September 1998
  • 20 Sep 1998 14:40 UTC
    | M 5.3 |
    118.3 km (73.5 mi) depth
    |
    158 km (98 mi) distance
    | USGS | Details
  • 02 Sep 1998 20:40 UTC
    | M 5.3 |
    658.9 km (409.4 mi) depth
    |
    274 km (170 mi) distance
    | USGS | Details
  • 19 Aug 1998 02:07 UTC
    | M 5.2 |
    213.2 km (132.5 mi) depth
    |
    139 km (86 mi) distance
    | USGS | Details
  • 14 Aug 1998 00:55 UTC
    | M 5.8 |
    57.6 km (35.8 mi) depth
    |
    138 km (86 mi) distance
    | USGS | Details
  • 31 Jul 1998 17:11 UTC
    | M 5.2 |
    116.9 km (72.6 mi) depth
    |
    295 km (183 mi) distance
    | USGS | Details
  • Show all

Map of aftershocks

Significant earthquakes in the same area since 1900

Major mag. 7.7 earthquake - Santa Cruz Islands (Vanuatu) on Monday, 21 April 1997

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