Bekasi, Saco-Indonesia.com - Segmen yang selama ini diam, terletak 37 km di selatan Kroya, Jawa Tengah, pada sabtu (25/1/2014) bersuara. Gejolak segmen itu menimbulkan gempa yang mengguncang wilayah hampir seluruh Jawa dengan goncangan terkuat di Kebumen.

Menurut informasi dari United States Geological Survey (USGS), gempa bermagnitud 6,1, terjadi pada pukul 12.14 WIB, pada kedalaman 89,1 km. Gempa tidak menimbulkan tsunami tapi disusul oleh 6 gempa susulan.

Terkait gempa tersebut, pakar tektonik dari Institut Teknologi Bandung (ITB), Irwan Meilano, sempat mengungkapkan adanya potensi gempa Kebumen untuk tidak hanya mengakibatkan gempa susulan, tetapi juga gempa yang terpicu (triggerred earthquake).

Irwan mengatakan, gempa yang terpicu oleh gempa Kebumen itu "bisa memiliki magnitud yang lebih besar dari gempa sebelumnya." (Baca artikel "Waspada, Gempa Kebumen Bisa Memicu Gempa Lebih Besar").

Peringatan ini mendapatkan respon beragam dalam kotak komentar di Kompas.com maupun media sosial Twitter, salah satunya adalah ketakutan dan tuduhan bahwa informasi tentang potensi gempa yang terpicu adalah upaya menakut-nakuti masyarakat.

"Jangan nakut-nakuti bos!" demikian komentar salah satu pembaca Kompas.com dengan akun bernama Juragan Minyak - kecewa Gubernur DKI abaikan sumber polusi bising di ibu kota, pada Sabtu pukul 20.19 WIB.

Sementara, di Twitter, pengguna bernama Dariel Siregar mengatakan, "Kepo!! Berita buat masyarakat resah aje." Anggi Anggarini punya kicauan hampir sama. "Jangan nakut2in donk :'(," katanya.

Haruskah Panik dan Takut?

Menanggapi komentar pembaca, Irwan memahami bahwa informasi potensi gempa memang bisa membuat publik panik. Tak sepenuhnya salah, sebab Indonesia memang memiliki historis gempa mematikan, seperti gempa Aceh tahun 2004 dan gempa Yogyakarta tahun 2006.

Namun, ia menegaskan bahwa tujuan pemberian informasi bukanlah untuk membuat panik. "Informasi potensi bencana memang harus diberikan untuk meningkatkan kewaspadaan kita," kata Irwan saat dihubungi Kompas.com, Minggu (26/1/2014).

Irwan mengungkapkan, seringkali terjadi, Indonesia menganggap rendah potensi bencana. Informasi yang diberikan kepada masyarakat tidak sesuai dengan potensi yang sebenarnya. "Agar masyarakat tenang," tuturnya.

Menurutnya, bencana-bencana yang merenggut banyak nyawa dan membuat negara merugi sebenarnya adalah akumulasi dari ketidakpedulian kita pada potensi bencana. "Kalau kita meng-underestimate potensi gempa, ini juga salah satu bentuk ignorance," ungkapnya.

Informasi potensi gempa yang sebenarnya memang bisa membuat panik dan takut. Namun, bagaimanapun tetap perlu diberikan dengan cara komunikasi yang pas sehingga tumbuh kesiapsiagaan menghadapi bencana serta perubahan sikap.

Irwan menuturkan, sejarah memang mengharuskan warga yang hidup di selatan Jawa untuk mewaspadai gempa. Aktivitas lempeng lautan terbukti telah memicu gempa dan tsunami di Banyuwangi pada tahun 1994 dan gempa dan tsunami Pangandaran tahun 2006.

Mengapa tak detail?

Akun Andri Jalu menulis dalam kotak komentar di Kompas.com, "Jelaskan dengan lebih detil tentang selang waktu gempa yang terpicu, buat orang awam yg bukan ahli, jadi tidak menimbulkan ketakutan kalo ada yg membaca artikel ini."

Mungkin memang sebuah keharusan bila pemberitahuan ancaman disertai dengan detail selang waktu gempa yang terpicu akan terjadi, wilayah mana yang kemungkinan mengalami, dan berapa besarnya. Sayangnya, detail tersebut sulit didapatkan.

Widjo Kongko, peneliti gempa dan tsunami dari Badan Pengkajian dan Penerapan Teknologi (BPPT), mengatakan bahwa gempa Kebumen terjadi di segmen yang jarang bergejolak. Dalam 4 dekade, cuma ada 10 gempa dengan magnitud lebih dari 5 yang terjadi di segmen itu.

Pada saat yang sama, patahan dan segmen penyebab gempa di selatan Jawa belum banyak terpetakan seperti di Sumatera. Karenanya, Widjo menyebut bahwa pengetahuan tentang wilayah tersebut masih gelap.

Karena belum banyak dipelajari, sulit memerkirakan wilayah yang akan terpicu aktivitasnya akibat gempa Kebumen kemarin, di samping memang sampai saat ini sulit memerkirakan waktu dan lokasi yang akan mengalami gempa.

Widjo hanya bisa memberi petunjuk lokasi yang masih umum. "Lokasi di Jawa selatan, bisa mendekati palung atau sebaliknya, ke daratan," ungkapnya. Berapa lama setelah gempa Kebumen gempa terpicu mungkin terjadi, belum bisa dikatakan.

Irwan mengungkapkan, gempa Kebumen kemarin terjadi dengan mekanisme sesar turun akibat slab pull. Slab pull secara sederhana adalah bergeraknya lempeng samudera karena adanya tarikan lempeng samudera yang berada di zona subduksi.

Menurut Irwan, gerakan turun lempeng akibat gempa Kebumen cukup curam. Ini bisa berarti bahwa bagian atas lempeng tersebut saat ini memiliki akumulasi energi dan berpotensi menimbulkan gempa yang terpicu.

"Jadi yang bisa diberikan, gempa yang terpicu ini mungkin terjadi di wilayah yang lebih dangkal," ungkapnya. Wilayah dangkal berarti berada pada kedalaman palung hingga 50 kilometer.

Gempa dangkal memang hanya akan dirasakan di wilayah yang cakupannya lebih sempit. Namun, goncangannya akan lebih terasa dampaknya jauh lebih merusak. Gempa Yogyakarta pada tahun 2006 dengan kedalaman episentrum hanya 10 km adalah salah satu gempa dangkal.

Gempa dangkal yang terjadi di lautan juga bisa berarti memiliki potensi tsunami bila gerakan sesarnya naik. Dengan goncangan lebih besar dan berpotensi tsunami, maka suatu gempa akan lebih mematikan.

Di luar konteks gempa yang terpicu, gempa Kebumen juga memberi petunjuk bahwa subduksi Jawa aktif. Selama ini, seringkali dianggap bahwa subduksi Jawa aseismik, tidak seaktif subduksi Sumatera.

Ilmuwan membagi subduksi Jawa menjadi tiga bagian, Selat Sunda hingga selatan Jawa Barat, selatan Jawa Tengah, serta selatan Jawa Timur hingga Bali. Masing-masing memang bisa memicu gempa dengan magnitud 8,5.

Apa yang harus dilakukan?

Perkembangan ilmu pengetahuan saat ini belum mampu memberikan kemampuan bagi manusia untuk meramal gempa. Pada saat yang sama, penelitian tentang beragam patahan penyebab gempa serta yang terkait masih terkendala dana. Di tengah situasi itu, apa yang harus dilakukan?

Widjo menuturkan, saat ini masyarakat bisa melakukan penyesuaian setelah mengetahui bahwa dirinya tinggal di lokasi rawan gempa. "Misalnya bangunan rumah dibuat tahan gempa," ungkap Widjo.

Sementara, Irwan mengatakan, informasi adanya ancaman seharusnya sudah cukup bagi pemerintah dan masyarakat untuk memulai perubahan.

"Warga harus lebih waspada, edukasi yang diberikan pemerintah ke masyarakat terus dilakukan, institudi pendidikan juga harus mulai membangun kesadaran tentang gempa," jelas Irwan.

Terkait adaptasi yang bisa dilakukan warga, peneliti dari Pusat Penelitian Geoteknologi LIPI, Eko Yulianto, saat ditemui Desember 2013 lalu menuturkan perlunya warga memiliki ruang aman untuk berlindung saat gempa.

Ruang aman bisa berupa ruang atau sudut mana pun di dalam rumah yang dibangun  tahan gempa. Strategi ini merupakan alternatif ketika membangun rumah tahan gempa masih sulit. Badan Nasional Penanggulangan Bencana (BNPB) perlu mengampanyekannya.

Sumber : Kompas.com

Editor : Maulana Lee

V, Karena Dari Laut Selatan Mengirim Sinyal Ancaman Gempa

Over the last five years or so, it seemed there was little that Dean G. Skelos, the majority leader of the New York Senate, would not do for his son.

He pressed a powerful real estate executive to provide commissions to his son, a 32-year-old title insurance salesman, according to a federal criminal complaint. He helped get him a job at an environmental company and employed his influence to help the company get government work. He used his office to push natural gas drilling regulations that would have increased his son’s commissions.

He even tried to direct part of a $5.4 billion state budget windfall to fund government contracts that the company was seeking. And when the company was close to securing a storm-water contract from Nassau County, the senator, through an intermediary, pressured the company to pay his son more — or risk having the senator subvert the bid.

The criminal complaint, unsealed on Monday, lays out corruption charges against Senator Skelos and his son, Adam B. Skelos, the latest scandal to seize Albany, and potentially alter its power structure.

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Preet Bharara, the United States attorney in Manhattan, discussed the case involving Dean G. Skelos and his son, Adam. Credit Eduardo Munoz/Reuters

The repeated and diverse efforts by Senator Skelos, a Long Island Republican, to use what prosecutors said was his political influence to find work, or at least income, for his son could send both men to federal prison. If they are convicted of all six charges against them, they face up to 20 years in prison for each of four of the six counts and up to 10 years for the remaining two.

Senator Kenneth P. LaValle, of Long Island, who serves as chairman of the Republican conference, emerged from a closed-door meeting Monday night to say that conference members agreed that Mr. Skelos should be benefited the “presumption of innocence,” and would stay in his leadership role.

“The leader has indicated he would like to remain as leader,” said Mr. LaValle, “and he has the support of the conference.” The case against Mr. Skelos and his son grew out of a broader inquiry into political corruption by the United States attorney for the Southern District of New York, Preet Bharara, that has already changed the face of the state capital. It is based in part, according to the six-count complaint, on conversations secretly recorded by one of two cooperating witnesses, and wiretaps on the cellphones of the senator and his son. Those recordings revealed that both men were concerned about electronic surveillance, and illustrated the son’s unsuccessful efforts to thwart it.

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Adam Skelos took to using a “burner” phone, the complaint says, and told his father he wanted them to speak through a FaceTime video call in an apparent effort to avoid detection. They also used coded language at times.

At one point, Adam Skelos was recorded telling a Senate staff member of his frustration in not being able to speak openly to his father on the phone, noting that he could not “just send smoke signals or a little pigeon” carrying a message.

The 43-page complaint, sworn out by Paul M. Takla, a special agent for the Federal Bureau of Investigation, outlines a five-year scheme to “monetize” the senator’s official position; it also lays bare the extent to which a father sought to use his position to help his son.

The charges accuse the two men of extorting payments through a real estate developer, Glenwood Management, based on Long Island, and the environmental company, AbTech Industries, in Scottsdale, Ariz., with the expectation that the money paid to Adam Skelos — nearly $220,000 in total — would influence his father’s actions.

Glenwood, one of the state’s most prolific campaign donors, had ties to AbTech through investments in the environmental firm’s parent company by Glenwood’s founding family and a senior executive.

The accusations in the complaint portray Senator Skelos as a man who, when it came to his son, was not shy about twisting arms, even in situations that might give other arm-twisters pause.

Seeking to help his son, Senator Skelos turned to the executive at Glenwood, which develops rental apartments in New York City and has much at stake when it comes to real estate legislation in Albany. The senator urged him to direct business to his son, who sold title insurance.

After much prodding, the executive, Charles C. Dorego, engineered a $20,000 payment to Adam Skelos from a title insurance company even though he did no work for the money. But far more lucrative was a consultant position that Mr. Dorego arranged for Adam Skelos at AbTech, which seeks government contracts to treat storm water. (Mr. Dorego is not identified by name in the complaint, but referred to only as CW-1, for Cooperating Witness 1.)

Senator Skelos appeared to take an active interest in his son’s new line of work. Adam Skelos sent him several drafts of his consulting agreement with AbTech, the complaint says, as well as the final deal that was struck.

“Mazel tov,” his father replied.

Senator Skelos sent relevant news articles to his son, including one about a sewage leak near Albany. When AbTech wanted to seek government contracts after Hurricane Sandy, the senator got on a conference call with his son and an AbTech executive, Bjornulf White, and offered advice. (Like Mr. Dorego, Mr. White is not named in the complaint, but referred to as CW-2.)

The assistance paid off: With the senator’s help, AbTech secured a contract worth up to $12 million from Nassau County, a big break for a struggling small business.

But the money was slow to materialize. The senator expressed impatience with county officials.

Adam Skelos, in a phone call with Mr. White in late December, suggested that his father would seek to punish the county. “I tell you this, the state is not going to do a [expletive] thing for the county,” he said.

Three days later, Senator Skelos pressed his case with the Nassau County executive, Edward P. Mangano, a fellow Republican. “Somebody feels like they’re just getting jerked around the last two years,” the senator said, referring to his son in what the complaint described as “coded language.”

The next day, the senator pursued the matter, as he and Mr. Mangano attended a wake for a slain New York City police officer. Senator Skelos then reassured his son, who called him while he was still at the wake. “All claims that are in will be taken care of,” the senator said.

AbTech’s fortunes appeared to weigh on his son. At one point in January, Adam Skelos told his father that if the company did not succeed, he would “lose the ability to pay for things.”

Making matters worse, in recent months, Senator Skelos and his son appeared to grow wary about who was watching them. In addition to making calls on the burner phone, Adam Skelos said he used the FaceTime video calling “because that doesn’t show up on the phone bill,” as he told Mr. White.

In late February, Adam Skelos arranged a pair of meetings between Mr. White and state senators; AbTech needed to win state legislation that would allow its contract to move beyond its initial stages. But Senator Skelos deemed the plan too risky and caused one of the meetings to be canceled.

In another recorded call, Adam Skelos, promising to be “very, very vague” on the phone, urged his father to allow the meeting. The senator offered a warning. “Right now we are in dangerous times, Adam,” he told him.

A month later, in another phone call that was recorded by the authorities, Adam Skelos complained that his father could not give him “real advice” about AbTech while the two men were speaking over the telephone.

“You can’t talk normally,” he told his father, “because it’s like [expletive] Preet Bharara is listening to every [expletive] phone call. It’s just [expletive] frustrating.”

“It is,” his father agreed.

Dean Skelos, Albany Senate Leader, Aided Son at All Costs, U.S. Says

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