megathrust, with the stretch lying south of the 1600-kilometer fault segment from the initial 2004 rupture (Tindol, 2006). A 'megathrust' earthquake caused by a rupture along New Zealand's largest fault line is a question of 'when', not 'if' according to experts (pictured: graphic illustrating projected tsunami) 2 / 4 JAKARTA (Bernama) â There are fears that last Fridayâs 6.9-magnitude earthquake in Banten, which also jolted the Indonesian capital of Jakarta some 120 kilometres away, would trigger a megathrust earthquake and impact the country. At 7:59 AM, a 9.1-magnitude earthquakeâone of the largest ever recordedâripped through an undersea fault in the Indian Ocean, propelling a massive column of water toward unsuspecting shores. The Sunda megathrust is a fault that extends approximately 5,500 km (3300 mi) from Myanmar (Burma) in the north, running along the southwestern side of Sumatra, to the south of Java and Bali before terminating near Australia. Abstract The great paleo-megathrust earthquake occurred in west Bengkulu-Sumatra on November 25, 1833 and it was estimated to have the magnitude of about Mw 8.6â9.1. A number of deadly earthquakes have occurred over the years, including the devastating 2004 tremor measuring 9.1 magnitude that struck off the coast of Sumatra and triggered a tsunami, as well as the 7.0-magnitude earthquake in Lombok, West Nusa Tenggara (NTB) in 2018. Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia. JAKARTA: There are fears that last Fridayâs 6.9-magnitude earthquake in Banten, which also jolted the Indonesian capital of Jakarta some 120 kilometres away, would trigger a megathrust earthquake and impact the country. 1. M. w ... 6.1 Aceh, Indonesia, earthquake estimated using GPS da ⦠The 2004 Aceh-Andaman earthquake was caused by the 1,600-km long rupture of the Sunda megathrust starting from North of Simeulue Island to North of Andaman Islands (Meltzner et al., 2006). Megathrust merupakan zona tumbukan antara lempeng Indo-Australia dan Eurasia. Jakarta, CNN Indonesia -- BMKG menyatakan gempa Megathrust merupakan ancaman riil yang patut diwaspadai oleh seluruh pihak. A report, released last week, looked into New Zealandâs worst ever megathrust earthquake, which occurred in the town of KaikÅura on the nationâs South Island in November 2016. In northern Simeulue Island, the southern terminus of the 2004 megathrust earthquake rupture area, a cluster of megathrust earthquakes occurred over a 56 year period between A.D. 1390 and 1455, resulting in uplift substantially greater than that caused by the 2004 event. Tectonics of Sumatra-Andaman Islands. TEMPO.CO, Jakarta - Meteorology, Climatology, and Geophysics Agency (BMKG) reported that the recent powerful earthquake jolted Simeulue Island of Aceh on Tuesday, January 7, was originated from the megathrust segment.. So, it caused a horrible Tsunami near of Padang city, which one of England ship forced up to 1 km reached inland of Arau river. It ruptured part between Sumatra segment and Sunda megathrust. Usually the culprit is a megathrust earthquake, as one tectonic plate slides, or subducts, beneath another. The interface between the two plates results in a large fault, termed an interplate thrust or megathrust. The largest recorded megathrust earthquake was the 1960 Valdivia earthquake, ... (Light) in Jakarta, the capital and largest city of Indonesia. Daryono menjelaskan, dalam buku Peta Sumber dan Bahaya Gempa Indonesia pada 2017, disebutkan di Samudra Hindia selatan Jawa terdapat tiga segmentasi megathrust, yaitu Segmen Jawa Timur, Segmen Jawa Tengah-Jawa Barat dan Segmen Banten-Selat Sunda. The 2004 Indian Ocean earthquake and tsunami occurred precisely at 7:59am local time on 26 December, with an epicentre off the west coast of northern Sumatra, Indonesia. This convergence is responsible for the intense seismicity and volcanism in Sumatra. Introduction. "Ketiga segmen megathrust ini memiliki magnitudo tertarget M8,7," katanya. Figure 1) causing the . during megathrust earthquakes. It was an undersea âmegathrustâ earthquake that registered a magnitude of 9.1â9.3. megathrust-earthquakes-in-Indonesia. The 2004 Indian Ocean earthquake and tsunami (also known as the Boxing Day Tsunami) occurred at 00:58:53 UTC on 26 December, with an epicenter off the west coast of northern Sumatra, Indonesia. The giant magnitude 9.2 earthquake of 26 December 2004 was caused by the rupture of a 1600 km section of the megathrust, as the two plates slid tens of meters past one another (Subarya et al. The December 26, 2004 M=9.1 Sumatra-Andaman earthquake occurred along a tectonic subduction zone in which the India Plate, an oceanic plate, is being subducted beneath the Burma micro-plate, part of the larger Sunda plate.. The great magnitude 9.2 SumatraâAndaman earthquake of 26 December 2004 resulted from up to 20 m of slip on the Sunda megathrust which, in turn, produced vertical seafloor displacements approaching 5 m in the deep water above the Sunda trench southwest of the Nicobar Islands and off-shore Aceh (Vigny et al., 2005, Subarya et al., 2006, Piatanesi and Lorito, 2007, Chlieh, ⦠It is a megathrust, located at a convergent plate boundary where it forms the interface between the overriding Eurasian plate and the subducting Indo-Australian plate. Jakarta Must Brace for Megathrust Earthquake: BMKG BY :SHEANY MARCH 01, 2018 ... (BNPB) spokesman Sutopo Nugroho said earthquake damages in Indonesia are mostly due to poor construction quality and there is an urgent need to to improve standards to avoid casualties in the future. The Sumatra-Andaman portion of the collision zone forms a subduction zone megathrust plate boundary, the Sunda-Java trench, which accommodates convergence between the Indo-Australia and Sunda plates. The M w 7.8, Mentawai earthquake occurred on October 25, 2010, offshore the fore-arc islands of North and South Pagai in the southern Mentawai archipelago (Indonesia, Fig. Since 2008, the government had conducted a series of studies to anticipate potential tsunamis following a megathrust quake, similar to the 2004 Boxing Day Tsunami that hit Aceh, she said. Previously reported, BMKG deputy of geophysics Muhamad Sadly said that the source of Lombokâs earthquake is a stark contrast to those of a megathrust. With a magnitude between 9.1 and 9.3, the Sumatra-Andaman earthquake is the third largest earthquake ever recorded on a seismograph. These gaps may be related to potential sources of future megathrust ea ⦠This earthquake triggered a tsunami that has 3-4 m height in the Bengkulu coastal and its vicinity. Our results reveal a seismic gap to the south of West Java, which is in agreement with a previous GPS study that finds the same region to be a potential future source of megathrust earthquakes. National 3 months ago Study on potential tsunami aims to inform, not incite panic: BMKG ... Banten jolt revives megathrust earthquake fears New, highâresolution seismic reï¬ection proï¬les and swath bathymetry collected across the northern limit of the M w 7.8, 25 October 2010 Mentawai tsunami earthquake rupture reveal signiï¬cant and systematic lateral variations in ⦠Relocation of earthquakes recorded by the agency for meteorology, climatology and geophysics (BMKG) in Indonesia and inversions of global positioning system (GPS) data reveal clear seismic gaps to the south of the island of Java. Indonesian authorities can no longer hide or dismiss the possibility of a megathrust earthquake, with a magnitude that could be higher than 9.0 [â¦] 1).As characteristic of tsunami earthquakes, this event ruptured a shallow patch of the subduction interface (Lay et al., 2011; Newman et al., 2011; Bilek et al., 2011), up-dip of the 2007, M w 8.4 Bengkulu ⦠7.West Sumatra Earthquake in 1797 (8,4 SR) Earthquake occurred in 1797 was the first big earthquakes in Sumatra. Lokasi Megathrust memanjang dari sebelah barat ujung Sumetera, menuju selatan Jawa, Bali, Nusa Tenggara. Dalam catatan sejarah, sejak tahun 1700 zona megathrust selatan Jawa sudah beberapa kali terjadi aktivitas gempa besar (major earthquake) dan dahsyat (great earthquake). 2006). âIndonesia is an earthquake zone that already has its zones mapped, with each having its own earthquake potential,â said Widjo in a separate location. This failure led to another 400 km rupture of the megathrust fault in the southern part of Simeulue Island (see . Indonesian authorities can no longer hide or dismiss the possibility of a megathrust earthquake, with a magnitude that could be higher than 9.0 on [â¦]