Volcano Update from Archive

Tuesday, August 14, 2007 09:22 HST (Tuesday, August 14, 2007 19:22 UTC)

19.43°N 155.29°W, Summit Elevation 4009 ft (1222 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE

Report prepared by the Hawaiian Volcano Observatory (HVO):

Summary: Hurricane Flossie is making it difficult to assess activity at the 7/21 fissure area or the effect of the magnitude-5.4 earthquake on the eruption. Instrumentally, there are no signs that the 7/21 fissure eruption has stopped. A magnitude-5.4 earthquake occurred at 7:38 pm and was located 7 km (4 miles) southeast of Pu`u `O`o beneath Pulama pali. HVO has located more than two dozen aftershocks with the largest being magnitude 3.2.

last 24 hours at 7/21 eruption site: An overflight yesterday afternoon confirmed that fissure segment B and C showed no signs of activity. Fissure segment D continued to feed a channel flowing to the northeast with a branch to the north. There were two flow fronts advancing into forest, one fed from the north channel branch and the other at the northeast flow front. However, rain has masked the eruption from webcam view since 6:02 pm. There were no obvious effects of the M5.4 earthquake on the eruption via instruments, but we have no visual confirmation of conditions at the eruption site yet.

Vent areas are hazardous and conditions can change rapidly. Access to the 7/21 eruption site in the Kahauale`a Natural Area Reserve is closed. A press release is available at http://www.state.hi.us/dlnr/chair/pio/HtmlNR/07-N076.htm.

last 24 hours at Pu`u `O`o crater: The webcam is still down. The tiltmeter on the north flank of Pu`u `O`o cone again recorded two microradians of deflation from a source to the southeast. Seismic tremor levels at Pu`u `O`o and nearby areas increased but are probably due to rising winds as Hurricane Flossie approaches.

last 24 hours at Kilauea summit: The tiltmeter network continued to record slow deflation after recovering from the M5.4 earthquake. Seismic tremor levels increased, probably due to wind. A few small shallow earthquakes were again located beneath Halema`uma`u crater.