An earthquake of magnitude 4.8 occurred on January 28, 2010 at 16:12:51 ( UTC ) in the Indonesian province of North Sumatra , 63.9 km southeast of Biryöen County [1] . The earthquake hypocenter was located at a depth of 8.4 kilometers [1] .
| Earthquake in northern Sumatra (2010) | |
|---|---|
 | |
| date and time | 01/28/2010 16:12:51 ( UTC ) |
| Magnitude | 4.8 Mw [1] |
| Depth hypocenter | 8.4 km [1] |
| Location epicenter | |
| Affected countries (regions) |  Indonesia |
| Tsunami | not |
| Injured | not |
| Economic damage | not |
| Aftershocks | not |
Tectonic conditions of the region
(Sumatra Fault) is the main cause of earthquakes in Indonesia, especially on the island of Sumatra. Major earthquakes occurred in this fault , such as the Liv earthquake in 1932 and , the Kerinci earthquake in 1909 and 1995, which resulted in significant casualties and material losses [2] .
Earthquakes for the Aceh region are not uncommon. The Sumatra Fault has several segments in Aceh. The corresponding map is published by the Center for Research and Development of the Department of Mining and Energy. Evidence for the existence of this fault is supported by aerial photographs as well as satellite imagery. In the Aceh region, the Sumatra Fault is divided into several segments: Lokop-Kutakan Fault, Blangkeyeren-Mamas Fault, Kl-Alas Fault, Reinge-Blankeyeren Fault, Anu-Bati Fault, Samalanga-Sipopokh Fault, Banda Aceh-Anu Fault, Bar Lamte Fault . A large amount of energy is accumulated in the fault due to the interaction of tectonic plates, and when it is released, it can cause earthquakes [2] .
The Sumatra Fault is an active tectonic fault that arose due to the collision of three large tectonic plates about 45.6 million years ago, during the formation of the Indonesian archipelago. The region is actively interacting: the Indo-Australian Oceanic Plate , moving north, the Eurasian Continental Plate , moving south, and the Pacific Plate , moving west. The pressure of the Indo-Australian Ocean Plate led to the fact that the island of Sumatra shifted and turned, forming an angle with the equator . In fact, according to geologists, initially the island of Sumatra is in the same position as the island of Java , that is, parallel to the equator. However, now the island extends from the north-west to the southeast, across the equator. The collision of plates also led to the appearance of hills, which are known as Barisan hills (Bukit Barisan in Indonesian), which are parallel to the fault [2] .
The Sumatra Fault is more right-handed, that is, the eastern block moves to the southeast, and the western blocks to the northwest. The fault zone extends to the Semangko Valley (Semangko Bay in Lampung ), Kepahiang, Ketahuna, Kerinchi [2] .
Consequences
An earthquake was felt in ( Central Aceh ) [3] .
Information about the victims and destruction as a result of the earthquake has not been reported [3] .
Notes
- ↑ 1 2 3 4 “M 4.8 - northern Sumatra, Indonesia” . earthquake.usgs.gov. Circulation date May 8, 2019.
- ↑ 1 2 3 4 Seaworld in Science • 2 Years ago. Geological Explanation of the Sumatra Fault That is the Trigger of the Earthquake . Steemit (October 7, 2017). Circulation date May 8, 2019.
- ↑ 1 2 “M 4.8 - northern Sumatra, Indonesia” . earthquake.usgs.gov. Circulation date May 8, 2019.
Literature
- Kerry Sieh, Danny Natawidjaja. Neotectonics of the Sumatran fault, Indonesia // Journal of Geophysical Research: Solid Earth. - 2000. - Vol. 105 , iss. B12 - P. 28295-28326 . - ISSN 2156-2202 . - DOI : 10.1029 / 2000JB900120 .
- Wahyu Triyoso, Danny Hilman Natawidjaja. THE SUMATRAN FAULT ZONE - FROM SOURCE TO HAZARD (Eng.) // Journal of Earthquake and Tsunami. - Vol. 01 , iss. 01 . - P. 21–47 . - ISSN 1793-4311 .