Strong mag. 6.1 earthquake - Tonga Islands on Thursday, 4 September 2014

Forte terremoto magnitudine 6.1 - Tonga Islands, giovedì, 04 settembre 2014

Forte terremoto magnitudine 6.1 - Tonga Islands, giovedì, 04 settembre 2014

Strong magnitude 6.1 earthquake at 0 km depth

4 Sep 07:17 UTC: Primo a segnalare: GeoAu dopo 1 ora e 43 minuti.
Profondità ricalcolata da 9.0 a 0.0 km.
Data & ora: 4 Sep 2014 05:33:45 UTC###AGESTRINGCOPY###
Magnitudine: 6.1
Profondità: 0.0 km
Epicentro latitudine / longitudine: 21,234°S / 173,267°W (Tonga)
Vulcano più vicino: Hunga Tonga-Hunga Ha'apai (234 km / 145 mi)
Nearby towns and cities:
175 km E da ‘Ohonua (Ohonua) (pop: 1,240)
192 km E da Lapaha (pop: 8,000)
194 km SE da Pangai (pop: 1,740)
201 km E da Nuku‘alofa (Nuku'alofa) (pop: 22,400)
249 km SE da Ha'apai
297 km SSE da Neiafu (pop: 4,320)
426 km SW da Alofi (Niue) (pop: 624)
590 km S da Hihifo (pop: 815)
Fonte dati primaria: GeoAu
Stima dell'energia sismica liberata: 8,9 x 1013 joules (24,8 gigawatt hours, equivalent to 21301 tons of TNT or 1,3 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 6.1 kmTonga IslandsGeoAu
M 6.010 kmTonga IslandsGFZ
M 6.012 km175km E of `Ohonua, TongaUSGS

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Nailsea / Violent shaking (MMI IX) : everything was destroyed and there were some injuries
Chicago Illinois / Very weak shaking (MMI II) : Lasted for about a minute. Shaking was weak, but noticeable since earthquakes don't occur very often in this part of the world. Many people who were sleeping didn't feel the earthquake, but others who were awake happened sometime between 12:35-12:38AM local time.
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Aftershocks of the 6.1 quake Tonga Islands 4 September 05:33 UTC

More info
Recorded aftershocks, latest first (0 quakes):
So far, no aftershocks have been registered.

Earlier earthquakes in the same area

Strong mag. 6.1 earthquake - Tonga Islands on Thursday, 4 September 2014 at 05:33 (GMT)
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