Earthquake 5.9 Mw 5 Februari 2008

A friend telephoned from Balikpapan told how an earthquake was a moment ago felt by him in the oil city, coal, and this wood.

After being checked in the USGS site, this earthquake happened struck 13,56 WITA (struck 12,56 WIB) have a force 5,9 Mw (6.2 SR) with the depth hiposentrum 44,8 km.

The earthquake was located in middle sea of the Makassar Strait the southern part, a line with the Majene city in Sulawesi Barat.

It was not yet known whether this earthquake triggered the tsunami.

Possibly not, the earthquake was still being not stronger.

The history of torque tensor from database USGS also did not show the existence of the mechanism of the earthquake with the fault pure the fault rose in this territory.

This kind fault was known that often caused the tsunami.

Along with the quotation of the details data about the earthquake came from the USGS site:
Earthquake Details Magnitude 5.9 Date-Time
Tuesday, February 05, 2008 at 05:56:51 UTC
Tuesday, February 05, 2008 at 01:56:51 PM at epicenter
Time of Earthquake in other Time Zones Location 3.498°S, 118.117°E
Depth 44.8 km (27.8 miles) Region SULAWESI, INDONESIA Distances 235 km
(145 miles) NW of Ujung Pandang, Sulawesi, Indonesia
285 km (180 miles) SSE of Balikpapan, Kalimantan, Indonesia
345 km (215 miles) SW of Palu, Sulawesi, Indonesia
1290 km (800 miles) ENE of JAKARTA, Java, Indonesia
Location Uncertainty horizontal +/- 14.3 km (8.9 miles); depth +/- 17.2 km
(10.7 miles) Parameters Nst= 49, Nph= 49, Dmin=>999 km, Rmss=1.17 sec, Gp=
M-type=moment magnitude (Mw), Version=7 Source USGS NEIC (WDCS-D)

Geologically, the location hiposentrum the exact earthquake was in the east bank the Paternoster micro-continent that at the same time limiting the South Makassar Basin to the west.

This position was the weak zone that accommodated the Makassar Strait opening the southern part for Paleogen; also had a position to the crack pattern other in the east bank of the Sundanese Mainland (Sundaland) that at the moment had a direction BL-Tenggara and SBD-UTL. Tectonically, then could be said that hiposentrum was in lineasi2 weak tectonics.

The distribution of the epicenter in this territory for the last 20 years not until ten points with the depth in general hiposentrum below 35 km and magnitude around 5 Mw.

The location of the distribution of the centers of this earthquake was arranged in all the patterns lineasi tectonics that has been known by us until now like the Adang Fault, retakan2 in Makassar Selatan, and lineasi Meratus.

Crack the stable Paternoster continent was avoided by the earthquake.

This found it easy to be understood because of the earthquake most happened in unit banks tectonics-geology.

But, understood because kinematics of this earthquake was not easy.

Earthquakes that were located all along the Adang Fault and crossed to the Walanae Fault in South Sulawesi still could be understood because these big faults formed a kind freeway down to Sumba Fracture that was previous hub to sub diction fault the Indian Ocean under Nusa Tenggara.

This earthquake incident showed a reality that the east bank of the Sundanese Mainland in forever did not yet die moving although was locked by the Buton collision and Banggai-Sula on the south-east and east Sulawesi.

There is lineasi2 latent geology that evidently still could be awakened by the style whether from where.

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