6.1 magnitude earthquake 29 km northeast shake Tarakan
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Why Earthquake Tarakan
Geologically Tarakan Island and the surrounding area is located in the Tarakan Basin. The dominant geological structures contained in this zone is a fault down. Geological history shows that in this zone ever growing massive sediment deposition process.
Accumulation sediman load in the delta region has led to some places in this basin has decreased and formed fault structure down. Some literature sources also indicate that from the east Tarakan contained micro subducted down Borneo.
The consequences of this tectonic dynamics is formed anticline in Bunyu and Tarakan.This complex tectonic conditions which further strengthen the notion that the Tarakan Basin is indeed an earthquake-prone region. Insecurity earthquake in this zone is attributed to the presence of several structural geological faults and subduction micro down from the east of Tarakan, also caused by the presence of several horizontal fault structure.
Tarakan and surrounding tectonically flanked by three horizontal fault system. To the south of the island of Tarakan there are two fault system trending southwest-southeast, which Mangkalihat Fault zone (Mangkalihat fault zone) and Zone Fault Maratua (Maratua fault zone). Mangkalihat Fault Zone is a continuation of the fault Fault Palu-Koro, passing near the town of Tanjung Redep.
The existence of Maratua Fault zone is also important to note, because the end of this fault lies in the oceans, which are located adjacent to the town of Tanjung Selor. Meanwhile, in the northern island of Tarakan also contained Fault Zone Perfect (Perfect fault zone) passing of the Sulawesi Sea to Sabah Malaysia and across the region adjacent to Sebatik Island.
Regardless of whether fault-fault mentioned above are still active or not, apparently still needs further research. However, the potential earthquake that may occur in the area still need to be wary of.
By: Dr. Daryono, S.Si, M.Si Head of Earthquake and Tsunami Mitigation BMKG
Earthquake Ever Happened In Tarakan Up Now
- Tarakan 4.8 magnitude earthquake, earthquake time: 22-Dec-15 at 07:18:39 AM local time, epicenter was in the sea 39 km Northeast of Tarakan.- An earthquake of 4.5 magnitude, timing earthquake: 21-Dec-15 02:30 AM GMT, the epicenter was on land 27km Northeast TARAKAN-KALTIM.- An earthquake of 6.1 magnitude, timing earthquake: 21-Dec-15 01:47:37 GMT, the epicenter was on land 29km Northeast TARAKAN-KALTIM.- An earthquake of 5.7 magnitude at 413 km Northeast city of Tarakan February 25, 2015 at 8:31 pm.- 4.8 magnitude tectonic earthquake in the sea 46 km to the southeast of Tarakan, East Kalimantan, on June 6, 2013 at 2:23 pm- An earthquake of 5.5 magnitude at a depth of 50 km in Tarakan, East Kalimantan, on November 12, 2007.- Tarakan 5.0 magnitude earthquake on February 24, 2007 at 12:05:33 pm.- An earthquake of February 28, 1936 Tarakan to force M = 6.5 SR.- An earthquake of February 14, 1925. The shock Tarakan reached MMI VII.- Earthquakes Tarakan 19 April 1923 (M = 7.0 SR) with a depth of 40 km the intensity of the shock hypocenter reached MMI VIII.
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