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2019 Sunda Strait earthquake

From Wikipedia, the free encyclopedia

2019 Sunda Strait earthquake
Us60004zhq ciim geo.jpg
Intensity map of the earthquake
UTC time2019-08-02 12:03:27
ISC event616062317
USGS-ANSSComCat
Local date2 August 2019
Local time19:03:27 WIB (Indonesia Western Standard Time)
Duration10–20 seconds
Magnitude6.9 Mw
Depth52.8 km (33 mi)
FaultUnknown, near Sunda megathrust
TypeOblique-slip
Areas affectedSouthern Lampung and western provinces of Java, Indonesia
Max. intensityVI (Strong)
Casualties8 dead, 8 injured, 33 displaced

The 2019 Sunda Strait earthquake occurred on the night of 2 August 2019, when a magnitude 6.9 earthquake rattled Sunda Strait at a moderate depth of 52.8 kilometres. The epicentre was located 214 km from Bandar Lampung, the capital of Lampung and 147 km west of Sumur, Pandeglang Regency. The earthquake struck with a maximum intensity of V (Moderate). The earthquake prompted a tsunami warning in the area, with authorities urging coastal residents to immediately evacuate to higher grounds.

The earthquake was the largest earthquake to have hit Jakarta and West Java since 2009, when a magnitude 7.0 struck Java killing 79 people. In the aftermath, the earthquake damaged a total of 505 structures across Banten and West Java. The earthquake caused 8 deaths, 8 injuries and displaced a total of 33 people. All of the deaths were indirectly caused by the earthquake.

Earthquake

The earthquake struck at 19:03 local time (12:03 UTC) at a moderate depth of 52.8 km (Indonesian BMKG stated that the earthquake struck at a depth of 10 km). The epicentre was located 147 km off the coast of Sumur, an area which had been previously destroyed by another tsunami in December 2018.[1] Indonesian geological agency BMKG recorded the magnitude of the earthquake as 7.4 while the USGS recorded it as a magnitude 6.9 earthquake.[2] BMKG subsequently revised the magnitude to 6.9 and its hypocentre to 48 km.[3]

The earthquake struck with an oblique-slip motion.[4] According to experts from the Indonesian BMKG, the earthquake wasn't caused by Sunda megathrust, but rather from a nearby fault, indicated by its north-south motion of the rupture. It was later confirmed that the earthquake was an intraplate earthquake.[5]

Intensity

Moderate shaking were widely reported across Lampung, Banten and West Java. In Jakarta, office workers and apartment residents were evacuated from high rise buildings, citing "strong shaking". The operation of Jakarta MRT was terminated due to the earthquake.[6] The earthquake could be felt as far away as Mataram, which was located in Lombok Island.[7] In Yogyakarta, residents reported "swaying motion" from the earthquake. The recorded maximum Mercalli-intensity of the earthquake was VI (strong). The maximum perceived intensity, however, was V (moderate).[2]

Tsunami

A tsunami warning was issued for Lampung and Banten, with an expected maximum height of 3 m.[8][9] Residents in coastal areas, especially those in Southern Lampung and Pandeglang Regency, were urged by authorities to evacuate to higher grounds. In Lampung, at least 1,050 people evacuated to the governor's office.[10] Initially, there were unconfirmed reports that water levels had receded in several areas in Banten. These reports were considered as hoaxes as observation of tide gauges showed that there were no observed changes in water levels around Banten and Lampung.[11] Nearly one and a half-hour after the warning was issued, it was cancelled by Indonesian BMKG.[12]

Casualties

On 3 August, the Indonesian Government confirmed that 2 people had died during the evacuation, one of whom reportedly died due to heart attack.[13] On 4 August, the death toll later rose to 5 and then stood at 6, specifically 1 in Pandeglang Regency, 3 in Lebak Regency and 2 in Sukabumi Regency. All of the deaths were indirectly caused by the earthquake and none were caused by fallen debris. Additionally, 3 injuries were reported and 33 people were displaced by the earthquake.[14] Finally, on 5 August, a number of eight casualties was confirmed.[15]

Damage

Since most of the buildings located in the region are vulnerable and don't meet with the current criteria for an earthquake-resistant building, significant damages were widely reported across the region. Most of the buildings in the region are considered as unreinforced masonry building.[16] Preliminary reports showed that dozens of structures across Banten and West Java had been either damaged or destroyed by the earthquake. On 3 August, hours after the quake, reports indicated that 21 houses and 1 mosque had been damaged.[17] The number later rose to 200.[18] Cracks were found in several homes in Bandung, the capital of West Java. A total of 7 homes were damaged in Bogor.[19]Pandeglang's Regional Disaster Management Board stated that 42 homes were damaged in Pandeglang, particularly in Mandalawangi.[20] A total of 505 structures, including schools, mosques and public institution, were damaged in the quake.[21] Traditional Baduy settlements with vernacular buildings reported little to no damage [22]

The Indonesian Ministry of Public Works and Public Housing, however, stated that no infrastructures had been damaged in the quake.[23]

Response

The Indonesian Ministry of Health stated that the Central Government's medical department will not help with the handling of the healthcare for the survivors, stating that the regional government is 'adequate enough' to handle.[24] The Ministry of Social Affairs stated that it had dispatched personnel of Tagana (Taruna Siaga Bencana) to the affected areas.[25] The ministry stated that those who perished in the quake would be compensated with Rp 15 million each.[26]

References

  1. ^ Irawan, Dhani (2 August 2019). "Gempa Magnitudo 7,4 Berpusat di Sumur Banten" (in Indonesian). Detik. Retrieved 6 August 2019.
  2. ^ a b "M 6.9 – 102km WSW of Tugu Hilir, Indonesia". United States Geological Survey. Retrieved 6 August 2019.
  3. ^ Rahayu, Lisye Sri (2 August 2019). "BMKG Mutakhirkan Data: Kekuatan Gempa Banten M 6,9" (in Indonesian). Detik. Retrieved 6 August 2019.
  4. ^ Utomo, Yunanto Wiji (2 August 2019). "Gempa Banten, Ahli Katakan Sebabnya adalah Gerak Sesar Oblique" (in Indonesian). Kompas. Retrieved 6 August 2019.
  5. ^ Siswadi, Anwar. "Kenapa Gempa Banten Tidak Hasilkan Tsunami?" (in Indonesian). Tempo. Retrieved 6 August 2019.
  6. ^ Ariefana, Pebriansyah (2 August 2019). "MRT Jakarta Mendadak Berhenti Saat Gempa 7,4 SR" (in Indonesian). Suara. Retrieved 6 August 2019.
  7. ^ "Gempa yang Berpusat di Banten Guncangannya Terasa Sampai Jawa & Mataram, Begini Penjelasan Ahli" (in Indonesian). Tribun News. 3 August 2019. Retrieved 6 August 2019.
  8. ^ Galih, Bayu (2 August 2019). "Gempa Banten, Peringatan Dini Tsunami Dirilis untuk Wilayah Ini" (in Indonesian). Kompas. Retrieved 6 August 2019.
  9. ^ "Gempa Banten, BMKG Sebut Potensi Tsunami Maksimal 3 Meter" (in Indonesian). CNN. 2 August 2019. Retrieved 6 August 2019.
  10. ^ Hidayat, Faiq (3 August 2019). "1.050 Warga Lampung Mengungsi Akibat Gempa M 6,9 Banten" (in Indonesian). Detik. Retrieved 6 August 2019.
  11. ^ Utomo, Yunanto Wiji (2 August 2019). "Gempa Banten, Ahli Konfirmasi Belum Ada Sinyal Tsunami yang Terdeteksi" (in Indonesian). Kompas. Retrieved 6 August 2019.
  12. ^ "BMKG: Peringatan Tsunami Berakhir" (in Indonesian). CNBC Indonesia. 2 August 2019. Retrieved 6 August 2019.
  13. ^ Rifa'i, Bahtiar. "BNPB: 200 Bangunan Rusak Akibat Gempa Banten, 2 Orang Tewas" (in Indonesian). Detik. Retrieved 7 August 2019.
  14. ^ Irawan, Dhani (4 August 2019). "Total Korban Tewas Gempa Banten Jadi 6 Orang" (in Indonesian). Detik. Retrieved 7 August 2019.
  15. ^ Media, Kompas Cyber. "Kemensos Verifikasi Ahli Waris Korban Tewas Akibat Gempa Banten". KOMPAS.com (in Indonesian). Retrieved 23 August 2019.
  16. ^ Rahma, Andita (3 August 2019). "Gempa Banten, BNPB: Ratusan Rumah Rusak Karena Tanpa Tulang" (in Indonesian). Tempo. Retrieved 7 August 2019.
  17. ^ "21 Rumah dan Satu Masjid di Jabar Rusak Akibat Gempa Banten" (in Indonesian). CNN. Retrieved 7 August 2019.
  18. ^ Nazmudin, Acep. "Update Gempa Banten: 200 Bangunan Rusak di Seluruh Wilayah Terdampak" (in Indonesian). Kompas. Retrieved 7 August 2019.
  19. ^ Sudarno, Achmad. "7 Rumah di Bogor Rusak Akibat Gempa Banten" (in Indonesian). Liputan6. Retrieved 7 August 2019.
  20. ^ Rifa'i, Bahtiar (3 August 2019). "Dampak Gempa Banten, 42 Rumah di Mandalawangi Pandeglang Rusak" (in Indonesian). Detik. Retrieved 7 August 2019.
  21. ^ "Gempa Banten Rusak 505 Bangunan dari Rumah hingga Sekolah" (in Indonesian). Harian Jogja. 4 August 2019. Retrieved 7 August 2019.
  22. ^ "Tak Satupun Rumah Suku Baduy yang Roboh" (in Indonesian). Banten News. Retrieved 9 September 2019.
  23. ^ "Dirjen Cipta Karya Kementerian PUPR Sebut Tak Ada Infrastruktur PU Rusak Akibat Gempa Banten" (in Indonesian). Tribun News. 5 August 2019. Retrieved 8 August 2019.
  24. ^ "Kemenkes: Penanganan Korban Gempa Banten Cukup oleh Pemda" (in Indonesian). Republika. Retrieved 8 August 2019.
  25. ^ Barus, Herry. "Kemnsos Kerahkan Kampung Siaga Bencana dan Tagana, Dampak Gempa Banten" (in Indonesian). Industry. Retrieved 8 August 2019.
  26. ^ Nazmudin, Acep. "Ahli Waris Korban Meninggal Gempa Banten Dapat Santunan Rp 15 Juta" (in Indonesian). Kompas. Retrieved 8 August 2019.

External links

This page was last edited on 7 October 2020, at 12:27
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