The Center for Volcanology and Geological Disaster Mitigation Surono said this eruption are minor and is not accompanied by booms. "Material eruption of ash that fell around the crater," said Surono.
Currently, the earthquake tremors occur continuously with the amplitude average of 15 millimeters.
According to officials at the observation post in the village monitor Ngadisari, Sikapura, Probolinggo, Subhan Ahmad, said the earthquake tremors are still happening. "Residents in the vicinity are safe," he said.
Bromo declared 'alert' since October 23, 2010 last. Lecturer Postgraduate Ten November Institute of Technology (ITS) Surabaya, and researcher at the Center for Earth and Disaster Studies, Dr Putu Artama, said Bromo characteristics different from Merapi.
"If there is an eruption, the materials of sand and ash spewed out by the range of 6 to 10 kilometer radius," said Putu.
That's different from material spewed out of Mount Merapi in the form of lava and rock, too hot clouds 'wedhus trash'.
Also, Bromo also terbentengi by the sea of sand. Topography of Mount Bromo mesh between valleys and canyons with the caldera or the sea of sand covering some 10 square kilometers. "That was a blast membayakan yellowish, because the sulfur content of many highly dangerous if inhaled human being," said Putu.
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