2025年2月25日 · The world's largest volcano: Mauna Loa, which rises 30,000 feet (9,000 meters) above the seafloor. Number of active volcanoes in the U.S.: 165.

2025年3月18日 · In 1992, volcanic tremor started about three weeks before Mount Spurr erupted. Another nearby volcano that erupted in 2009, Mount Readout, showed volcanic tremor for two …

2025年1月9日 · Despite the large volume of magma pooling below Yellowstone, the caldera isn't likely to erupt anytime soon. That's because the magma sits in pore spaces in solid rock within …

2024年4月7日 · A view of Mount Erebus from the Ross Sea in Antarctica. (Image credit: Alamy) Deception Island, on the other hand, is the caldera of an active volcano, which last erupted in …

2025年3月11日 · Before then, the volcano's most recent major eruptions were in 2016, 2014, 2007 and 2003. In the past, researchers also sighted ephemeral islands up to half a mile (1 …

2024年12月30日 · Volcanoes don't know or care when the Holocene started. But there is a good, physical reason to consider a volcano extinct after it's been quiet for more than 11,000 years, …

2017年2月2日 · The U.S. Geological Survey defines a volcano as a vent in Earth's surface, either on land or on the seafloor, from which molten rock called magma, as well as ash and gases, …

2025年3月2日 · The volcano has been experiencing about 75 years of unrest, which may or may not lead to an eruption. Should such an eruption occur, it is almost certain to be small, said …

2025年2月11日 · Mount Spurr has gotten restless before without erupting. For example, in 2004 and 2005, the volcano saw an increase in earthquakes, but it had quietened down by 2006, …

2024年5月31日 · Europe's awakening Campi Flegrei volcano experienced its biggest seismic swarm in 40 years, with 150 earthquakes rocking the region in southern Italy in the evening of …