2021 Timor Leste earthquake
   | |
| UTC time | 2021-12-29 18:25:51 |
|---|---|
| ISC event | |
| USGS-ANSS | ComCat |
| Local date | December 30, 2021 |
| Local time | 03:25 WITA |
| Magnitude | 7.3 Mw |
| Depth | 166.9 km (103.7 mi) |
| Epicenter | 7°35′31″S 127°34′52″E / 7.592°S 127.581°ECoordinates: 7°35′31″S 127°34′52″E / 7.592°S 127.581°E ⧼validator-fatal-error⧽ |
| Max. intensity | VII (Very strong) |
| Tsunami | No |
| Casualties | Unknown |
On December 29th, 2021, a 7.3 earthquake struck near Lospalos, East Timor, affecting places as far as Indonesia and Australia. The death toll is currently unknown.[1]
Tectonic Setting[edit]
The Banda Sea is situated in a region of complex convergence involving the Australian and Sunda plates. This complex tectonic interaction has broken the crust into a number of minor plates and microplates including the Banda Sea, Timor, Molucca Sea and Bird's Head plates. Resembling an arch, this convergent boundary is one of the most complex in the world. Oceanic lithosphere subduct to a depth greater than 600 km beneath the Banda Sea. As a consequence, the Banda Sea is a seismically active region. Many large earthquakes in the Banda Sea occur at a hypocenter depth of up to 600 km, including an Mw 7.6 which struck at 397 km depth. This intermediate-focus (70–300 km) and deep-focus (>300 km) earthquakes are the result of dip-slip faulting within the oceanic lithosphere, which usually do not result in significant impact. The 1938 Banda Sea earthquake, an Mw 8.5 event was an intermediate-focus thrust earthquake.[2]
References[edit]
- ↑ Hales, Holly (2021-12-29). "Northern Australia rocked by magnitude-7.2 earthquake in Indonesia". The Australian. Retrieved 2021-12-29.
- ↑ "M 8.5 – Banda Sea". earthquake.usgs.gov. USGS. Archived from the original on 24 June 2021. Retrieved 18 June 2021. Unknown parameter
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