Reviewed by USGS21y ago
M3.9 earthquake in Banda Sea
Monday, September 19, 2005, 19:48:38 UTC · 6.678°S, 130.062°E
A magnitude 3.9 earthquake struck in Banda Sea on Monday, September 19, 2005, 19:48:38 UTC, at a depth of 35.0 km (shallow).
- Magnitude
- 3.9
- Minor · mb
- Depth
- 35 km
- Shallow
- 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: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
11 tons of TNT
That is about 1/1,410 of the Hiroshima bomb. A magnitude 5.0 releases about 45 times more energy.
Tectonic setting
8 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: shallow
35 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
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 50 km
USGS lists 2 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.6 on September 22, 2005. 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 1,100 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.51938 Banda Sea EarthquakeFebruary 1, 1938 · 250 km NE of this epicenter
- 8.11963 Banda Sea EarthquakeNovember 4, 1963 · 59 km SW of this epicenter
- 7.7Banda SeaNovember 2, 1950 · 98 km W of this epicenter
- 7.5273 km WSW of Tual, IndonesiaJune 3, 1927 · 56 km E of this epicenter
- 7.3145 km NNE of Lospalos, Timor LesteAugust 30, 1917 · 280 km W of this epicenter
- 7.3281 km WSW of Tual, IndonesiaDecember 20, 1992 · 38 km E of this epicenter
- 7.3172 km NE of Lospalos, Timor LesteNovember 24, 1983 · 227 km SW of this epicenter
- 7.1196 km SSE of Ambon, IndonesiaJuly 4, 1914 · 195 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 16 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 67 recorded deaths. The most severe:
- 1852M8.3
Maluku: Bandanaira
25 Nov 1852 · 162 km away · intensity IX
60 deathsSevere damage ($5–24M)tsunami
- 1763
Bandaneira
12 Sep 1763 · 76 km away · intensity X
7 deathsModerate damage ($1–5M)tsunami
- 1710
Bandaneira
6 Mar 1710 · 240 km away · intensity IX
Severe damage ($5–24M)tsunami
- 1938M8.6
New Guinea
1 Feb 1938 · 250 km away · intensity VI
Moderate damage ($1–5M)tsunami
- 1975M5.9
Maluku: Bandanaira
15 Jan 1975 · 187 km away · intensity VII
Moderate damage ($1–5M)tsunami
- 1890
Bandaneira
23 Nov 1890 · 243 km away · intensity VII
Moderate damage ($1–5M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.