Reviewed by USGSTimor Leste20y ago
M5.5 earthquake 172 km NNE of Lospalos, Timor Leste
Wednesday, February 8, 2006, 07:44:51 UTC · 7.147°S, 127.736°E
A magnitude 5.5 earthquake struck 172 km NNE of Lospalos, Timor Leste on Wednesday, February 8, 2006, 07:44:51 UTC, at a depth of 239.5 km (intermediate). It is the strongest earthquake within 300 km since an M7.6 on January 27, 2006.
- Magnitude
- 5.5
- Moderate · mwc
- Depth
- 240 km
- Intermediate
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeDashed circle: 75 km aftershock search area
In context
How big was it, and why here?
Energy released
3 kilotons of TNT
That is about 1/6 of the Hiroshima bomb. It released about 6 times the energy of a magnitude 5.0.
Tectonic setting
11 km
from the nearest mapped plate boundary, between the Banda Sea and Timor plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: intermediate
240 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
Did You Feel It?
Where it was felt
No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.
I felt it — report to USGS ↗USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 75 km
USGS lists 3 M2.5+ earthquakes within 75 km in the following 30 days; the largest was M4.7 on February 21, 2006. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 897 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.11963 Banda Sea EarthquakeNovember 4, 1963 · 207 km E of this epicenter
- 7.7Banda SeaNovember 2, 1950 · 164 km E of this epicenter
- 7.6196 km S of Ambon, IndonesiaJanuary 27, 2006 · 191 km N of this epicenter
- 7.3145 km NNE of Lospalos, Timor LesteAugust 30, 1917 · 27 km SW of this epicenter
- 7.3281 km WSW of Tual, IndonesiaDecember 20, 1992 · 300 km E of this epicenter
- 7.3172 km NE of Lospalos, Timor LesteNovember 24, 1983 · 60 km SE of this epicenter
- 7.2187 km N of Baukau, Timor LesteFebruary 11, 1969 · 134 km W of this epicenter
- 7.258 km ENE of Lospalos, Timor LesteSeptember 29, 1905 · 129 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 6 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 7 recorded deaths. The most severe:
- 1763
Bandaneira
12 Sep 1763 · 281 km away · intensity X
7 deathsModerate damage ($1–5M)tsunami
- 1963M8.3
Banda Sea
4 Nov 1963 · 206 km away
Limited damage (under $1M)
- 1918M8.1
Banda Sea
18 Nov 1918 · 140 km away
- 1950M8.1
Banda Sea
2 Nov 1950 · 208 km away
- 1917M7.8
Banda Sea
30 Aug 1917 · 49 km away
- 2006M7.6
Banda Sea
27 Jan 2006 · 191 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.