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.

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April 16, 2009: Central African metropolis again threatened by looming volcanic activity

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April 9, 2009: Volcanoes and Hula Dance to the Same Beat

At Kīlauea's summit, the vent within Halema`uma`u Crater continues to emit elevated amounts of sulfur dioxide gas, resulting in high concentrations of sulfur dioxide downwind. Variable glow and vent noises over the past week suggest that lava is still present at shallow levels below the floor of Halema`uma`u crater.

A magnitude-5.0 earthquake at 12:44 p.m. H.s.t. on Tuesday, April 14, was located beneath the central part of Kilauea's south flank, about 12 km (8 miles) southeast of Kilauea's summit and at a depth of 10 km (6.2 miles). More than 650 people reported feeling it (http://earthquake.usgs.gov/eqcenter/dyfi/events/hv/00033612/us/index.html).

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 summary; email questions to askHVO@usgs.gov.

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