Kutipan dari edisi terbaru New Scientist No. 2554, 01 June 2006, hal. 4 (saya pikir kita punya banyak kasus erupsi yang diaktifkan gempa, daripada gempa skala besar yang diaktifkan erupsi) Java quake may have volcanic effect The earthquake last weekend on the Indonesian island of Java, which killed thousands and left hundreds of thousands homeless, may be about to trigger a second disaster. The Volcanological Survey of Indonesia says that volcanic activity on nearby Mount Merapi has tripled since the quake. Merapi has been giving cause for concern over the last 10 years and in recent weeks the Indonesian government has ordered evacuation for people living on the mountain slopes. There is normally thought to be no direct relationship between earthquakes and volcanoes, but it is possible for one to influence the other. "The earthquake epicentre was relatively close to Merapi, only around 50 kilometres away, so it is possible that the seismic activity did something to the magmatic plumbing system," says Brian Baptie, a seismologist at the British Geological Survey. "It is partially due to the kind of volcano it is. The lava dome is easily destabilised, with bits collapsing and forming pyroclastic flows." Although unusual, earthquakes have spurred a volcano into action before, including a sequence of eruptions in Alaska triggered by seismic waves from the Indian Ocean quake on 26 December 2004. Before the 27 May quake, the volcano was burping clouds of hot ash and gas about 50 times a day. By the next day the number had risen to more than 150, prompting fears that a major eruption could hit the region already devastated by the quake. Salam, awang
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