QuakeScout
Magnitude4.7

Reviewed by USGSSolomon Islands17y ago

M4.7 earthquake 137 km S of Lata, Solomon Islands

Friday, November 6, 2009, 21:31:43 UTC · 11.972°S, 165.772°E

A magnitude 4.7 earthquake struck 137 km S of Lata, Solomon Islands on Friday, November 6, 2009, 21:31:43 UTC, at a depth of 35.0 km (shallow). It is the strongest earthquake within 300 km since an M4.7 on November 5, 2009.

Magnitude
4.7
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

169 tons of TNT

That is about 1/89 of the Hiroshima bomb. A magnitude 5.0 releases about 3 times more energy.

Tectonic setting

12 km

from the nearest mapped plate boundary, between the Pacific and Australian 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 3 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M5.0 on November 24, 2009. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

M3M4M51h6h1d3d7d14d30dMainshock M4.7
Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.
  1. 5.0174 km S of Lata, Solomon Islands17y ago · 43 km SE of this epicenter
  2. 5.0148 km SSE of Lata, Solomon Islands17y ago · 37 km E of this epicenter
  3. 4.6140 km S of Lata, Solomon Islands17y ago · 16 km E of this epicenter

Regional history

Past M5+ earthquakes within 300 km

USGS lists 1,340 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 7.9199 km S of Lata, Solomon IslandsJuly 17, 1980 · 63 km S of this epicenter
  2. 7.8146 km SSE of Lata, Solomon IslandsDecember 31, 1966 · 77 km E of this epicenter
  3. 7.8186 km NNW of Sola, VanuatuDecember 17, 1957 · 111 km SE of this epicenter
  4. 7.8196 km NW of Sola, VanuatuOctober 7, 2009 · 90 km SE of this epicenter
  5. 7.7171 km NNW of Sola, VanuatuApril 21, 1997 · 119 km SE of this epicenter
  6. 7.7148 km NW of Sola, VanuatuOctober 7, 2009 · 140 km SE of this epicenter
  7. 7.7138 km SSE of Lata, Solomon IslandsJuly 18, 1934 · 72 km E of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 23 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:

  1. 1973M7.5

    Espiritu Santo, Luganille

    28 Dec 1973 · 291 km away · intensity VII

    Moderate damage ($1–5M)

  2. 1910M7.2

    Espiritu Santo

    10 Nov 1910 · 239 km away

    Moderate damage ($1–5M)tsunami

  3. 1997M7.7

    Santa Cruz Islands; Vanuatu

    21 Apr 1997 · 119 km away

    Limited damage (under $1M)tsunami

  4. 1980M7.5

    Santa Cruz Islands: Banks

    8 Jul 1980 · 82 km away

    Limited damage (under $1M)tsunami

  5. 1980M7.9

    Santa Cruz Islands; Vanuatu

    17 Jul 1980 · 63 km away

    tsunami

  6. 1934M7.8

    Santa Cruz Islands

    18 Jul 1934 · 105 km away

    tsunami

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

Nearby trackers

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