Padang Indonesia 2009 (CAR)

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Event ID
200909301016
Event name
Padang
Country
Indonesia
Region in the country
Sumatra
World region
Asia
Epicentral coordinates (long/lat)
POINT(99.856 -0.725)
WKT GIS format
GEMECD contributing partner
CAR
Event narrative

The southern Sumatra earthquake of September 30, 2009 occurred as a result of oblique-thrust faulting near the subduction interface plate boundary between the Australian and Sunda plates.

At the location of this earthquake, the Australian Plate moves north-northeast with respect to the Sunda plate at a velocity of approximately 60 mm/yr. On the basis of the currently available fault mechanism information and earthquake depth of 80 km, it is likely that this earthquake occurred within the subducting Australian Plate rather than on the plate interface itself. This earthquake therefore was deeper than typical subduction thrust earthquakes that generally occur at depths less than 50 km.

The subduction zone surrounding the immediate region of this event has not witnessed a megathrust earthquake in the recent past, rupturing last in an earthquake of M 8.5 or larger in 1797.

Approximately 350 km to the south, a 250 km section of the plate boundary slipped during an Mw 8.4 earthquake in September 2007, while approximately 300 km to the north, a 350 km section slipped during the Mw 8.7 earthquake of March 2005.

In early 2008, the plate boundary updip of the Padang 2009 earthquake was active in a sequence of Mw 5-6 earthquakes. It is not clear how the 2009 earthquake is related to the sequence of megathrust subduction zone events on the shallower section of the plate boundary. (Source: http://earthquake.usgs.gov/earthquakes/eqinthenews/2009/us2009mebz/#summary).

Date of occurrence (UTC)
2009-09-30
date
Time of occurrence (UTC)
10:16:00
time
Date of occurrence (local)
2009-09-30
date
Time of occurrence (local)
17:16:00
time
Day of the week (local)
Wednesday
Magnitude
7.6
Magnitude units
Moment (Mw)
Focal depth
81
km
Seismological data: source
USGS
Overall impact

The most affected areas included Padang City, the District of Pariaman, Padang Panjang and Bukit Tinggi. Minor damages also occurred in some areas in North Sumatra, Jambi, Kepulauan Riau, Pekan Baru and Bengkulu.

The earthquake caused more than 1,119 fatalities and circa 3,000 injuries, damage to more than 100,000 structures, with losses estimated at US$ 2.3 billion, quoted from an official report by BNPB (Indonesian National Disaster Management Agency). Most of the losses were caused by damage to infrastructure, especially in housing with losses of approximately US$ 1.6 billion.

Most damage was observed in the vicinity of Padang and Pariaman cities where many residential buildings as well as government offices, schools, hotels, mosques and hospitals collapsed. Padang city's population was around 900,000 and Pariaman city's population around 80,000.

People in coastal areas run to higher ground in fear of tsunami, which thankfully was not serious (a small local tsunami with wave heights of 27 cm (amplitude measured relative to normal sea level) was generated.

In Padang city fires broke out immediately after the earthquake in 74 locations, some continuing into the night. Many wooden and non-wooden structures were totally or partially burned.

There was major damage to 2,164 school buildings, 254 office buildings, 1,003 places of worship and 51 health facilities.

In Padang city, serious damage to the water pipelines caused a severe water shortage crisis.

In the Padang Pariaman district, 3 villages were buried by landslides killing around 600 people (Pulau Aiya, Jumena and Lubuk Laweh). In Pulau Aiya village up to 400 wedding attendants were killed by a landslide in tragic circumstances. The restaurant where the ceremony was being held was damaged but largely intact, but the attendants were apparently killed when they ran outside as the ground began to tremble but were swept away by the landslide that occurred just 40 m away. The village was eventually buried by up to 30 m thick landslide deposits.

Overview data
Loss: Human Casualty
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hide
People injured
2902
number
People injured: source
BNPB for West Sumatra Province (Indonesia's Agency for Disaster Management)
People injured: comment

People seriously injured
1214
number
People seriously injured: source
BNPB for West Sumatra Province (Indonesia's Agency for Disaster Management)
People seriously injured: comment

at least 788 were hospitalized


People missing
2
number
People missing: source
BNPB for West Sumatra Province (Indonesia's Agency for Disaster Management)
People missing: comment

People killed
1117
number
People killed: source
BNPB for West Sumatra Province (Indonesia's Agency for Disaster Management)
People killed: comment

People killed due to ground shaking
519
number
People killed due to ground shaking: source
The Jakarta Post (13/10/2009)
People killed due to ground shaking: comment

313 and 37 killed in Padang and Pariaman cities respectively mostly due to building collapse and falling debris

People killed due to ground shaking: status
Approximate

People dying post catastrophe due to shaking: source
No data available
People dying post catastrophe due to shaking: status
N/A

People missing due to tsunami
0
number
People missing due to tsunami: source
BNPB for West Sumatra Province (Indonesia's Agency for Disaster Management)
People missing due to tsunami: comment

A small local 27cm tsunami occurred (USGS)

People killed due to tsunami
0
number
People killed due to tsunami: source
BNPB for West Sumatra Province (Indonesia's Agency for Disaster Management)
People killed due to tsunami: comment

A small local 27cm tsunami occurred (USGS)

People missing due to fire following: source
No data available
People killed due to fire following: source
No data available
People missing due to slope failures
400
number
People missing due to slope failures: source
EERI, Special Earthquake Report, 2009
People missing due to slope failures: comment

approximately

People killed due to slope failures
200
number
People killed due to slope failures: source
EERI, Special Earthquake Report, 2009
People killed due to slope failures: comment

approximately

Loss: Building damage
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Total number of buildings destroyed by shaking
2013
number
Total number of buildings destroyed by shaking: source
BNPB for West Sumatra Province (Indonesia's Agency for Disaster Management)
Total number of buildings destroyed by shaking: comment

Number of buildings damaged by shaking
4658
number
Number of buildings damaged by shaking: source
BNPB for West Sumatra Province (Indonesia'sAgency for Disaster Management)
Number of buildings damaged by shaking: comment

Number of dwellings destroyed by shaking
114797
number
Number of dwellings destroyed by shaking: source
A joint report by the BNPB, Bappenas, and the Provincial and District/City Governments of West Sumatra and Jambi and international partners, October 2009
Number of dwellings destroyed by shaking: comment

Heavily damaged houses


Number of dwellings damaged by shaking
135036
number
Number of dwellings damaged by shaking: source
A joint report by the BNPB, Bappenas, and the Provincial and District/City Governments of West Sumatra and Jambi and international partners, October 2010
Number of dwellings damaged by shaking: comment

Moderately and lightly damaged houses


Loss: Socioeconomic
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People homeless
1250000
number
People homeless: source
Wikipedia
People homeless: comment

People affected by total or partial loss of their homes


Direct economic loss
2133.3
million US$
Direct economic loss: source
BNPD for West Sumatra Province (Indonesia's Agency for Disaster Management)
Direct economic loss: comment

www.bnpb.go.id.
The insured losses are not included in this figure.
Munich Re suggest 2,200 million US$ overall economic loss, including 100 million US$ in insured losses.


Indirect economic loss: status
N/A

Insured loss
100
million US$
Insured loss: source
Munich Re, Topics Geo, Natural Catastrophes 2009.
Insured loss: status
Greater than

Demographics
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hide
Total number of buildings: status
N/A