Volcano Watch is a weekly newsletter written by the scientists at the US Geological Survey's Hawaiian Volcano Observatory. It is published in the Hawaii Tribune-Herald's Sunday newspaper and the West Hawai'i Today's Monday newspaper, and posted here the following Monday or Tuesday. While primarily addressed to the residents of the Big Island of Hawai`i, some articles may have a broader scope. Article topics may range from volcanic features on the Big Island, volcanic hazards, informational topics of Long Valley, Montserrat, or Alaska, to topics about the Hawaiian Volcano Observatory.

Latest Issue:

December 31, 2009: Has it been 27 years already?

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December 24, 2009: Kīlauea glows as lava keeps churning at the summit

Glow above the collapse pit inset within the floor of Halema`uma`u Crater, at Kīlauea's summit, has been visible at night from the Jaggar Museum. Lava was visible through an opening in the floor of the collapse pit throughout the week, as recorded by the Webcam perched on the rim of Halema`uma`u. The lava level, however, dropped in response to the deflation-inflation cycle. Volcanic gas emissions remain elevated, resulting in high concentrations of sulfur dioxide downwind.

One earthquake beneath Maui Island was reported felt this past week. A magnitude-3.7 earthquake occurred at 11:39 a.m., H.s.t., on Thursday, December 31, 2009, and was located 53 km (33 miles) north of Kahului, Maui, at a depth of 19 km (12 miles).

Visit our Web site (http://hvo.wr.usgs.gov) for detailed Kīlauea and Mauna Loa activity updates, recent volcano photos, recent earthquakes, and more; call (808) 967-8862 for a Kīlauea activity summary; email questions to askHVO@usgs.gov.

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