QuakeScout
Magnitude4.6

Reviewed by USGSTimor Leste43y ago

M4.6 earthquake 134 km NE of Lospalos, Timor Leste

Monday, March 26, 1984, 04:22:53 UTC · 7.637°S, 127.834°E

A magnitude 4.6 earthquake struck 134 km NE of Lospalos, Timor Leste on Monday, March 26, 1984, 04:22:53 UTC, at a depth of 164.9 km (intermediate). It is the strongest earthquake within 300 km since an M4.7 on March 23, 1984.

Magnitude
4.6
Light · mb
Depth
165 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 earthquake

In context

How big was it, and why here?

Energy released

120 tons of TNT

That is about 1/126 of the Hiroshima bomb. A magnitude 5.0 releases about 4 times more energy.

Tectonic setting

65 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

165 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 50 km

USGS has not published any M2.5+ earthquake within 50 km in the 30 days after this event.

Regional history

Past M5+ earthquakes within 300 km

USGS lists 363 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 · 209 km E of this epicenter
  2. 7.7Banda SeaNovember 2, 1950 · 174 km NE of this epicenter
  3. 7.3145 km NNE of Lospalos, Timor LesteAugust 30, 1917 · 39 km NW of this epicenter
  4. 7.3172 km NE of Lospalos, Timor LesteNovember 24, 1983 · 41 km NE of this epicenter
  5. 7.2187 km N of Baukau, Timor LesteFebruary 11, 1969 · 168 km NW of this epicenter
  6. 7.258 km ENE of Lospalos, Timor LesteSeptember 29, 1905 · 82 km SW of this epicenter
  7. 7.1186 km NE of Lospalos, Timor LesteMay 15, 1962 · 53 km NE of this epicenter
  8. 7.077 km N of Baukau, Timor LesteFebruary 14, 1952 · 149 km W of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 5 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:

  1. 1963M8.3

    Banda Sea

    4 Nov 1963 · 211 km away

    Limited damage (under $1M)

  2. 1908M6.6

    Timor

    23 Mar 1908 · 292 km away

    Limited damage (under $1M)tsunami

  3. 1918M8.1

    Banda Sea

    18 Nov 1918 · 147 km away

  4. 1950M8.1

    Banda Sea

    2 Nov 1950 · 223 km away

  5. 1917M7.8

    Banda Sea

    30 Aug 1917 · 24 km away

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

Nearby trackers

Closest city pages