DOI-USGS-HVO-2013-01-08T19:30:54-10:00 HawaiianVolcanoObservatory@vulcan4. 2013-01-08 19:30:53 Actual Alert Public Geo Unknown Minor Unlikely 2013-01-08 19:30:53 2013-01-09 19:30:53 Hawaiian Volcano Observatory Hualalai Monthly Update No unusual seismicity or deformation was detected. <b>Background:</b> Hualalai is the third most active volcano on Hawai`i Island and typically erupts 2 to 3 times per 1,000 years. Hualalai last erupted in 1801 and, more recently, had a damaging seismic swarm in 1929 that probably was the result of a shallow intrusion of magma. Hualalai Volcano is monitored by a single continuous GPS instrument and a single seismometer located southwest of the summit as well as several instruments on nearby flanks of Mauna Loa and Mauna Kea. Key sites on Hualalai and West Mauna Loa are resurveyed every other year to detect any changes in the volcano's shape. In addition, Hualalai deformation is assessed several times per year using satellite radar interferometry. http://hvo.wr.usgs.gov askHVO@usgs.gov Volcano Alert Level=NORMAL Aviation Color Code=GREEN Hualalai volcano Hawaii and Pacific Ocean HI 19.692 -155.87 CAVW=1302-04-