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Padang Lebih Siap Hadapi Gempa dan Tsunami

Agustus 12, 2010 1 komentar
Tribunnews.com – Kamis, 5 Agustus 2010 19:29 WIB
Laporan Wisnu Agung Prasetyo, Asisten SKP BSB
TRIBUNNEWS.COM, JAKARTA
– Kota Padang, Sumatera Barat (Sumbar), saat ini dinilai lebih maju dalam mengantisipasi kemungkinan datangnya di masa mendatang.

Kemajuan tersebut ditunjukkan dengan berbagai upaya mitigasi bencana yang dilakukan Pemerintah Kota Padang dan Provinsi Sumatera Barat, serta Taruna Siaga Bencana (Tagana) setempat.

Salah satu upaya yang dilakukan adalah pembangunan shelter multifungsi sebagai tempat perlindungan sekaligus terminal evakuasi apabila terjadi gempa dan tsunami. Hal tersebut dikatakan oleh Staf Khusus Presiden Bidang Bantuan Sosial dan Bencana (SKP BSB) Andi Arief, Kamis (5/8/2010), setelah mendapat laporan dari Tim Assessment dari Kantor SKP BSB yang sedang melakukan penilaian terhadap kesiapan Sumatera Barat, khususnya Kota Padang dan Kepulauan Mentawai, dalam menghadapi potensi  gempa bumi dan tsunami.

“Padang dan Mentawai berada pada jalur red zone, salah satu jalur patahan tektonik aktif yang paling rawan gempa di Indonesia. Kewaspadaan pemerintah dan masyarakat melalui berbagai langkah mitigasi bencana, harus ditingkatkan,” kata Andi Arief.

Pemkot Padang telah menyelesaikan pembangunan satu shelter multifungsi dari seratus shelter yang direncanakan. Satu shelter yang selesai dibangun itu merupakan gedung SMA Negeri 1 Padang.

“Secara umum, shelter mutifungsi didesain empat tingkat dengan luas bangunan yang bervariasi sesuai keadaan lokasi. Selain didesain khusus untuk memecah ombak, atap shelter juga difungsikan sebagai helipad bagi pendaratan helikopter,” lanjutnya.

Padang pantas bersiap untuk menghadapi situasi yang sulit. Sebab, menurut Andi, setidaknya terdapat tiga hasil riset yang menyebutkan tingginya potensi kegempaan di Padang dan gugusan Kepulauan Mentawai, yang dipisahkan oleh selat Mentawai.

“Tiga riset tersebut adalah penelitian koral mikroatal yang dilakukan Dr. Danny Hilman Natawidjaja dari LIPI, peta seismic hazard 2010 yang baru saja dirilis oleh sembilan pakar gempa bumi Indonesia, serta analisis statistik yang dilakukan Ir. Didik Wahju Widjaja,” katanya.

Bagian pesisir Padang yang padat, oleh National Geographic juga disebut sebagai tempat beresiko tertinggi di dunia apabila terjadi tsunami. (*)

Rumah Unik Khas Warga Kampung Naga, Tahan Gempa dengan Sistem Garumpai

[ Minggu, 21 Maret 2010 ]

Tiba di Kampung Naga di Desa Neglasari, Kecamatan Salawu, Kabupaten Tasikmalaya, pengunjung disuguhi pemandangan deretan rumah-rumah unik khas warga Kampung Naga. Rumah-rumah tersebut beratap ijuk dan rumbia serta berdinding kayu dan anyaman bambu.

Struktur dan fondasi bangunan milik warga Kampung Naga disesuaikan dengan filosofi adat Sunda. Bangunan didirikan layaknya struktur tubuh manusia. Bangunan tersebut terdiri atas suku (kaki, Red), awak (badan, Red), dan sirah (kepala, Red). Tiap bagian diartikan warga sebagai akhlak yang harus dilaksanakan manusia. Yakni, tekad (niat), ucap (perkataan), dan lampah (perbuatan).

Keunikan bangunan Kampung Naga juga terletak pada cara pemasangannya. Atap rumah terpasang dengan kukuh. Bahkan, atap tersebut kuat menahan guncangan gempa bumi. Padahal, atap itu dipasang tanpa paku. Untaian atap rumah terpasang dengan adanya rangkaian bambu penyangga yang disebut garumpai. Garumpai berfungsi menjaga kesatuan konstruksi atap bangunan. Garumpai bisa lentur mengikuti gerakan ketika terjadi gempa.

Rumah adat Naga berdiri di atas batu-batu penyangga yang tidak dicor atau ditanam ke dalam tanah. Tiang-tiang utama rumah hanya ditumpukkan pada batu. Konstruksi tersebut bisa sangat dinamis mengikuti getaran. Tiap bagian memiliki fungsi penting. Ketiganya harus berjalan beiringan tanpa mungkin dipisahkan satu sama lain.

Seluruh bangunan di kampung seluas 1,5 hektare itu tertata dengan rapi. Luas tersebut tidak berubah dari masa ke masa. Pertambahan penduduk dialihkan ke luar Kampung Naga atau disebut Naga Luar. Saat ini, wilayah itu dihuni 314 orang. Batas Kampung Naga di sebelah timur adalah Sungai Ciwulan. Sebelah barat berbatasan dengan bukit dan hutan larangan. Sebelah utara dan selatan berbatasan dengan parit air.

Di antara total 113 bangunan di wilayah Kampung Naga, ada empat bangunan utama yang dianggap penting. Yakni, bale ageung, bale kampung, masjid, dan leuit (lumbung). (jpnn/c12/ruk)

sumber : jawapos

Schools damaged, closed after quake

Januari 31, 2010 Tinggalkan komentar

The Jakarta Post ,  Jakarta   |  Sat, 01/30/2010 5:39 PM  |  National

Hundreds of elementary school students in Central Aceh have been unable to attend classes after a magnitude-5 earthquake on Thursday night severely damaged their school buildings.

Spokesman for the regional administration Windi Darsa said Saturday at least 16 schools had been closed following the quake, which shook most part of Central Aceh.

He said the local government was in need of financial assistance to provide tents for the students.

“For the sake of safety, the school buildings have been closed. We expect the provincial government or other donors to help us erect emergency tents to keep the learning activities going,” Windi was quoted by Antara news agency.

The quake also affected hundreds of houses, health centers and other public facilities. Material losses from the disaster are estimated at Rp 5.3 billion.

After shock: Two elementary students passes a building damaged after a 5-magnitude quake shook three districts in Central Aceh and Bener Meriah regency in Aceh on Saturday. At least 300 houses and education facilities were reportedly damaged in the late Friday quake.

sumber : http://www.thejakartapost.com/news/2010/01/30/schools-damaged-closed-after-quake.html

http://neic.usgs.gov/neis/bulletin/neic_sabh_w.html

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Stay Calm, Local Scientists Urge, After Sumatra Quake and Tsunami Warning

Januari 19, 2010 Tinggalkan komentar

January 18, 2010

Dessy Sagita

A local expert on Monday urged the public not to worry too much after prominent European seismologists warned that there was the potential for a massive earthquake and tsunami in Sumatra.

“We can’t predict when an earthquake will happen,” Fauzi, a geophysicist from the Meteorology, Climatology and Geophysics Agency, told the Jakarta Globe on Monday.

He also added that it was impossible to predict imminent tsunamis, let alone ones that might take place sometime in the next 20 or more years.

“If somebody says that a tsunami will occur tomorrow, next week, or next month, that’s totally impossible; nobody can tell the exact time,” he said.

A team of seismologists led by Irish scientist John McCloskey said on Sunday that an 8.5-magnitude, wave-generating quake capable of killing as many people as the 2004 Indian Ocean tsunami could strike off Sumatra, with Padang in the firing line.

In a letter published by the scientific journal Nature Geoscience, McCloskey and his team explained that the threat comes from a relentless buildup of pressure over the last two centuries on a section of the Sunda Trench, one of the world’s most notorious earthquake zones, which runs parallel to the western Sumatra coast.

Without giving a time frame for the event, the letter said, “The threat of a great tsunamigenic earthquake with a magnitude of more than 8.5 on the Mentawai patch is unabated.”

But Fauzi said the public, especially those living in West Sumatra and still reeling from last year’s devastating quake, should not be too worried because there was no time frame mentioned in the article.

Ade Edward, head of West Sumatra’s Disaster Management Agency, said that instead of worrying, the public should instead focus on disaster mitigation.

“We should be preparing ourselves in case the disaster really happens,” he said, adding that the government was working to develop a tsunami early detection system and was busy constructing as many quake-proof buildings as it could.

Ade maintained that the West Sumatran government has been attempting to warn its people about the possibility of another earthquake and tsunami.

“We told them about the situation we are facing and we offered them two choices — relocate or stay and adapt to face the upcoming challenge,” he said.

In March 2005, McCloskey warned that the Dec. 26, 2004, quake near Aceh had created major stresses in an adjoining part of the fault to the south. He stated that a temblor in the region of 8.5 magnitude with the capacity to generate a tsunami was imminent and urged the authorities to beef up preparations. Within two weeks, on March 28, 2005, a quake measuring 8.6 erupted at Simeulue Island, generating a three-meter tsunami.

sumber : http://thejakartaglobe.com/home/stay-calm-local-scientists-urge-after-sumatra-quake-and-tsunami-warning/353435

Indonesian Government to Test Stability of Buildings Against Quakes

Januari 19, 2010 Tinggalkan komentar

January 01, 2010

Putri Prameshwari & Ismira Lutfia

After two major earthquakes last year left hundreds dead and millions of dollars worth of infrastructure destroyed, the government on Wednesday said it would begin using a new method to determine the ability of an area to withstand seismic tremors.

Edi Prihantoro, an analyst at the State Ministry for Research and Technology, said a system called Probabilistic Seismic Hazard Analysis would be carried out at sites being eyed for building construction.

Using the PSHA, the soil conditions on a construction site would be evaluated, and the data sent to the Ministry of Public Works, which would then specify a set of guidelines for the construction.

The PSHA, Edi said, would help minimize the number of casualties and damage to property caused by earthquakes. An earthquake by itself doesn’t kill people, but brings down poorly constructed buildings.

And because there is no way of predicting when an earthquake will strike, ensuring a structure’s stability is the next best thing, he added.

“With the PSHA, we can learn, for example, whether the soil at a certain area is stable enough to carry the weight of a building,” Edi said.

Josia Irwan Rastandi, chairman of the structural reliability testing division at University of Indonesia’s School of Engineering, said buildings in here generally have little resistance to seismic forces because they were not up to strict standards for construction.

“Jakarta is the only city where infrastructure is tested by a building construction supervisory team [TPKB],” he said.

Edi said the government was preparing to use the PSHA in Java and Sumatra, with Papua and Sulawesi to follow.

“We’re handing [the system] over to local administrations so they can apply it themselves,” he said.

Edi said the Research and Technology Ministry also has plans to boost disaster awareness among students this year by publishing a guidebook that would be distributed to all school levels across the country.

“We’ve also been doing tsunami drills with the local administrations,” Edi said.

Nirwono Joga, an urban planning expert from the civil engineering department of the Trisakti University, said buildings must be strong enough to resist at least a magnitude-8 earthquake.

“Poorly constructed buildings are the main cause for casualties in an earthquake,” Nirwana said.

sumber : http://thejakartaglobe.com/national/indonesian-government-to-test-stability-of-buildings-against-quakes/350391

Bencana Indonesia 2009

Januari 8, 2010 Tinggalkan komentar

Ancaman gempa bumi di Mentawai

Desember 24, 2009 Tinggalkan komentar

Ini ada artikel tentang ancaman bencana gempa bumi di Mentawai

Indonesia’s next big quake due under Mentawais

By Michael Perry

SYDNEY, Dec 21 (Reuters) – A massive undersea earthquake is long overdue beneath the Mentawai islands in Indonesia and could trigger another deadly tsunami, say scientists mapping one of the world’s most quake-prone zones.

Unlike the 2004 Indian Ocean tsunami, which killed around 226,000 people, this tsunami is expected to be smaller but may be very deadly as it would hit Sumatra’s densely populated coast.

“The size of the tsunami may not be as big, but the problem is the size of the population is about three times as great as Aceh,” Kerry Sieh, director of the Singapore-based Earth Observatory, told Reuters.

A major quake measuring around 8.6 magnitude is expected beneath Siberut Island, along the Sunda megathrust, where the Indo-Australian tectonic plate butts up against the Eurasian plate — one of the world’s most active fault lines.

Exactly when the big quake will strike is not known.

“We say most likely in the next few decades. Thirty seconds to 30 years, somewhere in there,” said Sieh, who has studied geological records showing that for the past 700 years, major quakes have occurred along the Sunda megathrust every 200 years.

There have been three major quake cycles: the late 1300s, the 1600s, and between 1797 and 1833.

“The timing between those three sequences is about two centuries,” said Sieh, adding a section of the megathrust under Siberut has not ruptured for 200 years, so it is due to slip and cause a major quake.

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