QuakeScout
Magnitude7.0

Reviewed by USGSIndonesia17y ago

M7.0 earthquake 66 km SSW of Banjar, Indonesia

Wednesday, September 2, 2009, 07:55:01 UTC · 7.782°S, 107.297°E

A magnitude 7.0 earthquake struck 66 km SSW of Banjar, Indonesia on Wednesday, September 2, 2009, 07:55:01 UTC, at a depth of 46.0 km (shallow). USGS received 604 “Did You Feel It?” reports, with a maximum reported intensity of VII (very strong). It is the strongest earthquake within 300 km since an M7.5 on August 8, 2007.

Magnitude
7.0
Major · mwc
Depth
46 km
Shallow
Felt reports
604
Max intensity VII
Est. shaking
VII
Very strong (ShakeMap)
PAGER alert
None
Not issued
Tsunami
No flag
USGS feed

Outlined circle: this earthquakeDashed circle: 200 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)

In context

How big was it, and why here?

Energy released

477 kilotons of TNT

That is about 32 times the Hiroshima bomb. It released about 1,000 times the energy of a magnitude 5.0.

Tectonic setting

205 km

from the nearest mapped plate boundary, between the Sunda and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.

Depth: shallow

46 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

Reports sent by people to USGS, grouped by place (most reports first). Intensity uses the Modified Mercalli scale (I–X): what people felt, not the magnitude.

PlaceIntensityReportsDistance
Jakarta, Jakarta, IndonesiaV · Moderate295190 km
Bandung, Jawa Barat, IndonesiaV · Moderate82111 km
Bogor, Jawa Barat, IndonesiaV · Moderate21151 km
Semarang, Jawa Tengah, IndonesiaIV · Light15359 km
Depok, Jawa Barat, IndonesiaIV · Light13168 km
Yogyakarta, Yogyakarta, IndonesiaIV · Light11342 km
Cikarang, Jawa Barat, IndonesiaIV · Light10174 km
Sleman, Yogyakarta, IndonesiaIV · Light9337 km
Tangerang, Banten, IndonesiaIV · Light8197 km
Serpong, Banten, IndonesiaIV · Light8182 km
Ciputat, Banten, IndonesiaV · Moderate7190 km
Kuta, Bali, IndonesiaIII · Weak6874 km
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 200 km

USGS lists 6 M2.5+ earthquakes within 200 km in the following 30 days; the largest was M5.5 on September 2, 2009. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

M3M4M5M6M71h6h1d3d7d14d30dMainshock M7.0
Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.
  1. 4.979 km SSW of Banjar, Indonesia17y ago · 14 km SW of this epicenter
  2. 4.578 km SSW of Banjar, Indonesia17y ago · 12 km S of this epicenter
  3. 4.986 km SSW of Banjar, Indonesia17y ago · 20 km S of this epicenter
  4. 4.875 km SSW of Banjar, Indonesia17y ago · 9 km S of this epicenter
  5. 5.363 km S of Banjar, Indonesia17y ago · 17 km E of this epicenter
  6. 5.568 km S of Banjar, Indonesia17y ago · 11 km E of this epicenter

Regional history

Past M5+ earthquakes within 300 km

USGS lists 431 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 7.7226 km SSW of Singaparna, IndonesiaJuly 17, 2006 · 168 km S of this epicenter
  2. 7.535 km NNE of Rengasdengklok, IndonesiaAugust 8, 2007 · 214 km N of this epicenter
  3. 7.487 km SSW of Srandakan, IndonesiaJuly 23, 1943 · 295 km E of this epicenter
  4. 7.030 km WNW of Labuan, IndonesiaApril 1, 1943 · 252 km NW of this epicenter
  5. 6.850 km WSW of Labuan, IndonesiaJuly 3, 1954 · 241 km NW of this epicenter
  6. 6.829 km SW of Labuan, IndonesiaOctober 25, 2000 · 229 km NW of this epicenter
  7. 6.679 km WSW of Labuan, IndonesiaAugust 13, 1913 · 257 km NW of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 32 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 1,715 recorded deaths. The most severe:

  1. 2006M7.7

    Java

    17 Jul 2006 · 168 km away

    802 deaths$55 million damagetsunami

  2. 1924

    Java: Wonosobo

    2 Dec 1924 · 292 km away · intensity IX

    727 deathsSevere damage ($5–24M)

  3. 2009M7.0

    Java

    2 Sep 2009 · 0 km away

    81 deathsSevere damage ($5–24M)tsunami

  4. 1924

    Java

    12 Nov 1924 · 281 km away

    60 deaths

  5. 1979M6.1

    Java

    2 Nov 1979 · 106 km away

    30 deaths$16 million damage

  6. 1875

    W Java: Kuningan

    25 Oct 1875 · 148 km away · intensity VIII

    7 deathsSevere damage ($5–24M)

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

Nearby trackers

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