Strong and deep M6.4 earthquake struck Tonga region
Strong and deep earthquake with magnitude 6.4 struck Tonga region on April 28, 2012. Epicenter was located 78 km (48 miles) W of Neiafu, Tonga (18.643°S, 174.725°W). Recorded depth was 129.4 km (80.4 miles) by USGS.
Earthquake was harmless for shaking damage and tsunami as the depth and source of earthquake is unable to generate strong shaking or tsunami waves. Additionaly, the people living in this region are familiar with strong shaking.
|Depth||129.4 km (80.4 miles)|
|Distances||78 km (48 miles) W of Neiafu, Tonga
280 km (173 miles) N of NUKU`ALOFA, Tonga
315 km (195 miles) SSW of Hihifo, Tonga
2266 km (1408 miles) NNE of Auckland, New Zealand
|Location Uncertainty||horizontal +/- 15 km (9.3 miles); depth +/- 4.6 km (2.9 miles)|
|Parameters||NST=454, Nph=457, Dmin=611.1 km, Rmss=0.81 sec, Gp= 22°,
M-type=centroid moment magnitude (Mw), Version=9
Historical seismicity - M7 and greater since 1900
Featured image: Google Earth + USGS