Magnitude 6.8 Earthquake
Loyalty Islands
May 10, 2011
GDACS Issues Green Tsunami Alert
Nonetheless, the earthquake triggered a green tsunami alert by GDACS. A green alert means very limited chance on damage and/or injuries as a result of the waves generated. No Pacific-wide Tsunami was expected by the Pacific Tsunami Warning Center (PTWC).
The Global Disaster Alert and Coordination System provides near real-time alerts about natural disasters around the world and tools to facilitate response coordination, including media monitoring, map catalogues and Virtual On-Site Operations Coordination Centre.
Magnitude | 6.8 |
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Date-Time |
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Location | 20.252°S, 168.273°E |
Depth | 14.9 km (9.3 miles) |
Region | LOYALTY ISLANDS |
Distances |
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Location Uncertainty | horizontal +/- 13.2 km (8.2 miles); depth +/- 2.5 km (1.6 miles) |
Parameters | NST=534, Nph=553, Dmin=>999 km, Rmss=0.95 sec, Gp= 14°, M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=C |
Source |
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Event ID | usc0003ag4 (click for details) |
There have been several aftershocks in the Loyalty Islands so far with the largest to date being a 5.7M. Several more aftershocks are expected, but they should
This earthquake is similar to the ones that occurred in December, 2010, and again in January this year which occurred as the result of normal-faulting within the Australia plate, in the region of the boundary between the Australia plate and the Pacific plate. This is a very active region due to the stresses which occur where the Australia plate subducts beneath the Pacific plate at the New Hebrides trench.
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