In the second half of 2004, according to the USGS/NEIC on-line database there were two earthquakes with magnitudes 7.5 or more. These are —
|
Date and Time |
Lat |
Lon |
Depth |
Magnitudes (mb, MS) |
Prediction |
|
|
2004/12/23 14:59 |
-50.145 |
160.365 |
10 |
6.6 |
7.5 |
|
|
2004/12/26 0:58 |
3.316 |
95.854 |
30 |
6.3 |
8.8 |
|
The first one, i.e., the 23 December 2004, M8.1 Macquarie Great earthquake, happened outside the areas of the standard M8 application (i.e., the 262 circles of 667-km radius each).
The second one, i.e., the 26 December 2004, Mw9.0 (Ms8.8) off the west coast of Northern Sumatra (Great Asian) mega-thrust earthquake, requires special comments and considerations:
