Perilous Times
May 11, 2010
Series of earthquakes shake Icelandic volcano
There were more than 40 earthquakes at the Eyjafjallajökull volcano on
Monday, beginning around 11:00 a.m., says a daily report from the
Icelandic Meteorological Office and the Institute of Earth Sciences at
the University of Iceland.
Most of them were estimated to be between 11 and 12 miles below the
surface.
This could be in part that because the background tremor, the rumbling
of the volcano itself, is lower than last week, so earthquakes that
might previously not have been detected are being picked up.
The series of earthquakes indicates that magma is still flowing in to
the volcano from the Earth's mantle. Presently, there are no
indications that the eruption is about to end.
There was a slight increase in explosive activity Monday, resulting in
a briefly higher ash plume. The eruption plume, which was light grey,
reached 17,000 feet, at times shooting up to 20,000 feet. It headed
southeast in low, level winds.
The Iceland National Guard did not do an over flight of the volcano,
but observations from web cameras showed activity similar to Sunday.
The volcano's crater is getting higher, its lava flow is low and not
visible to the cameras.
In Iceland, ashfall was reported at Drangshlíð and Skarðshlíð almost
continuously beginning Sunday at 3 p.m.. The ash was rather coarse,
said farmers on whose land it fell.
By Elizabeth Weise