Volcano Watch: Kilauea activity update for April 30, 2015

Time-lapse movie from images gathered from a temporary thermal camera looking into Pu’u ‘O’o Crater. The temperature scale is in degrees Celsius up to a maximum of 500 Celsius (932 Fahrenheit) for this camera model, and scales based on the maximum and minimum temperatures within the frame. Thick fume, image pixel size and other factors often result in image temperatures being lower than actual surface temperatures. April 23-30, 2015. Images courtesy of USGS/HVO

Time-lapse movie of Pu’u ‘O’o Crater North Flank from the North Rim. April 23-30, 2015. Images courtesy of USGS/HVO

(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

KÄ«lauea’s summit lava lake rose during the past week, tracking summit inflation, and began to overflow sporadically starting on Tuesday, April 28. However, as of this writing (Thursday, April 30), the summit had begun to deflate slowly, and the lava lake level had dropped slightly. As of Thursday, April 30, seismicity at the summit and along the upper East and Southwest Rift Zones was elevated during the past week.

KÄ«lauea’s East Rift Zone lava flow continues to feed widespread breakouts northeast of PuÊ»u ʻŌʻō. The most distant extent of the currently active breakouts was 8.3 km (5.2 mi) from PuÊ»u ʻŌʻō on Wednesday, April 29, based on satellite imagery.

Two earthquakes were reported felt on the Island of Hawai‘i in the past week. On Wednesday, April 29, 2015, at 7:35 a.m., HST, a magnitude-3.0 earthquake occurred 2.1 km (1.3 mi) southeast of Kīlauea Summit at a depth of 1.0 km (0.6 mi). On Wednesday, April 29, at 9:16 a.m., HST, a magnitude-3.4 earthquake occurred 6.4 km (4.0 mi) north of Ka‘ena Point at a depth of at 7.3 km (4.5 mi).

Visit the HVO website (http://hvo.wr.usgs.gov) for past Volcano Watch articles, KÄ«lauea daily eruption updates and other volcano status reports, current volcano photos, recent earthquakes, and more; call (808) 967-8862 for a KÄ«lauea summary update; email questions to askHVO@usgs.gov

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