QuakeScout
Magnitude4.1

Reviewed by USGSTimor Leste20y ago

M4.1 earthquake 186 km NNE of Lospalos, Timor Leste

Thursday, February 23, 2006, 15:11:27 UTC · 7.099°S, 127.901°E

A magnitude 4.1 earthquake struck 186 km NNE of Lospalos, Timor Leste on Thursday, February 23, 2006, 15:11:27 UTC, at a depth of 35.0 km (shallow).

Magnitude
4.1
Light · 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

21 tons of TNT

That is about 1/707 of the Hiroshima bomb. A magnitude 5.0 releases about 22 times more energy.

Tectonic setting

13 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 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M4.1 on March 4, 2006. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

M3M41h6h1d3d7d14d30dMainshock M4.1
Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.
  1. 4.1171 km NNE of Lospalos, Timor Leste20y ago · 23 km W of this epicenter

Regional history

Past M5+ earthquakes within 300 km

USGS lists 951 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 8.11963 Banda Sea EarthquakeNovember 4, 1963 · 189 km E of this epicenter
  2. 7.7Banda SeaNovember 2, 1950 · 145 km E of this epicenter
  3. 7.6196 km S of Ambon, IndonesiaJanuary 27, 2006 · 183 km N of this epicenter
  4. 7.5273 km WSW of Tual, IndonesiaJune 3, 1927 · 296 km E of this epicenter
  5. 7.3145 km NNE of Lospalos, Timor LesteAugust 30, 1917 · 42 km SW of this epicenter
  6. 7.3281 km WSW of Tual, IndonesiaDecember 20, 1992 · 281 km E of this epicenter
  7. 7.3172 km NE of Lospalos, Timor LesteNovember 24, 1983 · 52 km SE of this epicenter
  8. 7.2187 km N of Baukau, Timor LesteFebruary 11, 1969 · 150 km W of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 8 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 67 recorded deaths. The most severe:

  1. 1852M8.3

    Maluku: Bandanaira

    25 Nov 1852 · 290 km away · intensity IX

    60 deathsSevere damage ($5–24M)tsunami

  2. 1763

    Bandaneira

    12 Sep 1763 · 262 km away · intensity X

    7 deathsModerate damage ($1–5M)tsunami

  3. 1963M8.3

    Banda Sea

    4 Nov 1963 · 187 km away

    Limited damage (under $1M)

  4. 1918M8.1

    Banda Sea

    18 Nov 1918 · 122 km away

  5. 1950M8.1

    Banda Sea

    2 Nov 1950 · 189 km away

  6. 1917M7.8

    Banda Sea

    30 Aug 1917 · 46 km away

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

Nearby trackers

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