Terremoto molto forte magnitudine 6.3 - South Pacific Ocean, 155 km a est da Nuku\'alofa, Tongatapu, lunedì, 17 ottobre 1983

Terremoto molto forte magnitudine 6.3 - South Pacific Ocean, 155 km a est da Nuku\'alofa, Tongatapu, lunedì, 17 ottobre 1983

Terremoto molto forte magnitudine 6.3 at 30 km depth

Data & ora: 17 Oct 1983 13:25:21 UTC
Magnitudine: 6.3
Profondità: 30.4 km
Epicentro latitudine / longitudine: 20.794°S / 173.758°W (South Pacific Ocean, Tonga)
Vulcano più vicino: Feinga Seamount (163 km / 101 mi)
Nearby towns and cities:
125 km SSE da Pangai (pop: 1,740) --> Vedi sismi vicini
137 km ENE da ‘Ohonua (Ohonua) (pop: 1,240) --> Vedi sismi vicini
141 km ENE da Kolonga (pop: 1,100) --> Vedi sismi vicini
155 km ENE da Nuku'alofa (pop: 22,400) --> Vedi sismi vicini
155 km ENE da Nuku‘alofa (pop: 22,400) --> Vedi sismi vicini
240 km S da Neiafu (pop: 4,320) --> Vedi sismi vicini
446 km OSO da Alofi (Niue) (pop: 624) --> Vedi sismi vicini
449 km OSO da Hakupu (Niue) (pop: 221) --> Vedi sismi vicini
459 km OSO da Mutalau (Niue) (pop: 133) --> Vedi sismi vicini
Fonte dati primaria: USGS (United States Geological Survey)
Stima dell'energia sismica liberata: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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.
M 6.330 kmTongaUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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More info
Recorded aftershocks, latest first (7 quakes):
  • 03 Feb 1984 23:34 UTC
    | M 4.9 |
    33 km (20.5 mi) depth
    64 km (40 mi) distance
    | USGS | Details
  • 22 Jan 1984 13:51 UTC
    | M 5.5 |
    50.9 km (31.6 mi) depth
    80 km (50 mi) distance
    | USGS | Details
  • 28 Dec 1983 11:21 UTC
    | M 5.3 |
    49.6 km (30.8 mi) depth
    22 km (14 mi) distance
    | USGS | Details
  • 04 Dec 1983 19:30 UTC
    | M 5.4 |
    33 km (20.5 mi) depth
    18 km (11 mi) distance
    | USGS | Details
  • 03 Dec 1983 03:22 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    42 km (26 mi) distance
    | USGS | Details
  • 02 Dec 1983 14:50 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    46 km (29 mi) distance
    | USGS | Details
  • 20 Oct 1983 02:05 UTC
    | M 5.3 |
    69.7 km (43.3 mi) depth
    24 km (15 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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