USGS Hawaiian Volcano Observatory geologists observed lava roiling in the north and south vents at the summit of Kīlauea on Friday, November 21. Shortly after, lava flowed onto Halemaʻumaʻu crater floor for the first time since episode 36 (November 9). That activity continued through the weekend, with 73 overflows total. Over the past 24 hours, Kīlauea summit deflated and the overflows stopped, causing the forecast window for episode 37 to be adjusted slightly later in time. Episode 37 could occ

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There are thousands of volcanic features distributed throughout the southwest United States, which are grouped together in volcanic fields. The Yellowstone Volcano Observatory (YVO) monitors these volcanoes using a combination of techniques. While YVO hasn’t seen anything to suggest magma is on the move, the area is stretched and pulled apart to produce numerous tectonic earthquakes. YVO keeps an eye on these volcanoes and the Yellowstone Volcano, as described in this monthly video update by Mik