Tongariro
volcano (New Zealand): seismic swarm, a possible precursor to new
activity
23
July, 2012
Tongariro
volcano is showing signs of a possible awakening. On 13 July 2012, an
increase in small (<M2.5) earthquakes was detected. The quakes
were clustered at depths of 2-7 km under the area between Emerald
crater and Te Mari crater. More than 20 earthquakes were recorded
until 20 July, when the seismic activity peaked and prompted GeoNet
to raise the alert level from 0 to 1. Compared to a background
average of 2 quakes per year, the swarm is significant and could
indicate magma movements. Seismic activity dropped on 21 July with
only 1 quake since then, but preliminary measurements show an
increase in volcanic gas emission. NZ Scientist started to increase
their monitoring at the volcano.
- All news about: Tongariro volcano
- Information about: Tongariro volcano
-->
Dust storms + drought = Dust
Bowl 2.0
24
July, 2012
July 24, 2012 – PHOENIX — A dust storm, or haboob, enveloped the greater Phoenix area in a cloud of yellow-gray blowing dust on Saturday night. The dust storms are becoming more frequent. For the second time since Saturday, a dust storm muscled its way into the Valley, just in time for the afternoon commute. National Weather Service meteorologist Charlotte Dewey said the storm was moving northwest and was first spotted between Eloy and Tucson. The dust storm covered cities in the metropolitan Phoenix area such as Scottsdale, Gilbert, Mesa, Apache Junction, Santan Valley, Chandler, Casa Grande and downtown Phoenix. There were no official estimates of its size, but Dewey says spotters estimated it was around 2,000 feet tall. She says there were also reports of 35 mph wind gusts in the area, and a report of a 50 mph gust at Phoenix Sky Harbor Airport. Above are photos of the event from The Associated Press and our iWitness Weather contributors. –KPHO
Torrential rains hammer central Nigeria, killing 35
24
July, 2012
No comments:
Post a Comment
Note: only a member of this blog may post a comment.