Wulkanologia
Erupcja wulkanu
Wulkanologia jest działem geologii zajmującym się badaniami wulkanów, ich budową, kształtem, rozmieszczeniem na kuli ziemskiej, powstawaniem, a także badaniem materiału pochodzenia wulkanicznego.
Osoba zajmująca się badaniem wulkanów nazywa się wulkanologiem. Jest to jeden z najbardziej niebezpiecznych zawodów na świecie. Wielu wulkanologów w czasie badań ginie podczas erupcji wulkanu, którą nie zawsze da się przewidzieć. Znanymi wulkanologami którzy zginęli 3 czerwca 1991 w Japonii wskutek nagłego wybuchu wulkanu, byli Katia Krafft i Maurice Krafft.
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MSH80 eruption mount st helens 05-18-80.jpg
On May 18, 1980, at 8:32 a.m. Pacific Daylight Time, a magnitude 5.1 earthquake shook Mount St. Helens. The bulge and surrounding area slid away in a gigantic rockslide and debris avalanche, releasing pressure, and triggering a major pumice and ash eruption of the volcano. Thirteen-hundred feet (400 meters) of the peak collapsed or blew outwards. As a result, 24 square miles (62 square kilometers) of valley was filled by a debris avalanche, 250 square miles (650 square kilometers) of recreation, timber, and private lands were damaged by a lateral blast, and an estimated 200 million cubic yards (150 million cubic meters) of material was deposited directly by lahars (volcanic mudflows) into the river channels. Sixty-one people were killed or are still missing. USGS Photograph taken on May 18, 1980, by Austin Post.
On May 18, 1980, at 8:32 a.m. Pacific Daylight Time, a magnitude 5.1 earthquake shook Mount St. Helens. The bulge and surrounding area slid away in a gigantic rockslide and debris avalanche, releasing pressure, and triggering a major pumice and ash eruption of the volcano. Thirteen-hundred feet (400 meters) of the peak collapsed or blew outwards. As a result, 24 square miles (62 square kilometers) of valley was filled by a debris avalanche, 250 square miles (650 square kilometers) of recreation, timber, and private lands were damaged by a lateral blast, and an estimated 200 million cubic yards (150 million cubic meters) of material was deposited directly by lahars (volcanic mudflows) into the river channels. Sixty-one people were killed or are still missing. USGS Photograph taken on May 18, 1980, by Austin Post.