Powerful seaquake near Tonga islands


Downtown Nuku'alofa

Downtown Nuku'alofa - Image via Wikipedia


Earthquake Report comment :
Very powerful seaquake on the subduction zone and 157 km (97 miles) ENE (58°) from NUKU'ALOFA, Tonga.
NO tsunami bulletin has been published by NOAA
GDACS has just issued a GREEN earthquake alert for this earthquake = very limited chance on damage and/or injuries
0 people are living within a radius of 50 km around the epicenter
6,488 people are living within a radius of 100 km around the epicenter
109,700 people are living within a radius of 200 km around the epicenter
Following data from USGS probably approx. 7,000 people will feel a Mercalli V shaking (moderate shaking)  and approx. 103,000 will experience a IV (light shaking).
People are used to earthquakes  (can somebody be used to earthquakes ?) which are even a lot bigger than this one.
If the epicenter location would be confirmed, the closest islands are Limu and Lifuka. Both islands make part of the Ha`apai Group in the centre of the country. Their distance to the epicenter is approx. 50 km.
Lifuka was the place where Captain James Cook dubbed Tonga "The Friendly Islands" and close to Lifuka off the island of Tofua is where the mutiny on the Bounty occurred in 1789. It has a population of 2,968 and an area of 11.42 km².

Most important Earthquake Data:
Magnitude : M 5.8
Sunday, October 17, 2010 at 02:27:46 AM at epicenter
Depth (Hypocenter) : 9.5 km
Geo-location(s) :
157 km (97 miles) ENE (58°) from NUKU'ALOFA, Tonga
195 km (121 miles) S (179°) from Neiafu, Tonga

Links to important maps
USGS Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS Shaking map
USGS historic earthquakes map
USGS Pager map
GDACS Green Earthquake Alert (Global Disaster Alert and Coordination System)

* GDACS (Global Disaster Alert and Coordination System) provides near real-time alerts about natural disasters around the world. GDACS is a Joint Initiative of the United Nations and the European Commission

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