Anatahan Volcano Update
Anatahan Volcano Update for May 3, 2004
Submitted Monday, May 3, 2004 at 1000 local Anatahan time
A moderate eruption began at Anatahan April
24, producing steam and ash to ~2,000 ft (600 m). A
"cow-pie"-shaped dome was observed a day or two later. On April 28, the
seismicity peaked at a high for the
year, and the dome increased in size. The average seismicity level
has decreased somewhat
over the last 4 1/2 days, but M 2 to M 2.5 events and small
explosions still occur every minute or so, and
steam and ash are still rising to a few thousand
feet. The eruption could become more explosive at any
time with little or no warning.
The Emergency Management Office, Office of the Governor, CNMI, has
placed Anatahan Island off-limits until further notice and concludes
that, although the volcano is not currently dangerous to most aircraft
within the CNMI airspace, conditions may change rapidly, and aircraft
should pass upwind of Anatahan or >30 km downwind from the island and
exercise due
caution within 30-50 km of Anatahan.
Contact persons:
Juan Takai Camacho, Geophysical Seismic Technician, EMO Saipan; tel:
(670) 322-9528, fax: (670) 322-7743, email: juantcamacho@hotmail.com
Ramon Chong, Geophysical Instrument Specialist, EMO Saipan; tel: (670)
322-9528, fax: (670) 322-7743, email: rcchongemo@hotmail.com
Frank Trusdell, Geologist, USGS; tel: (808) 967-8812, fax: (808) 967-8890,
email: trusdell@usgs.gov
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