DOI-USGS-HVO-2012-12-12T07:43:21-10:00 HawaiianVolcanoObservatory@vulcan4. 2012-12-12 07:43:18 Actual Alert Public Geo Unknown Minor Unlikely 2012-12-12 07:43:18 2012-12-13 07:43:18 Hawaiian Volcano Observatory Mauna Kea Monthly Update No unusual deformation or seismicity was detected. Four earthquakes were located beneath Mauna Kea at depths greater than 13 km (8 mi). <b>Background:</b> Mauna Kea was last active about 4,600 years ago. Monitoring is conducted using three seismometers and one GPS receiver on the volcano plus instruments on adjacent Kohala volcano and denser seismic and geodetic networks on the north flank of Mauna Loa to the south. In addition, satellite radar interferometry data are available a few times per month with which possible deformation can also be evaluated. http://hvo.wr.usgs.gov askHVO@usgs.gov Volcano Alert Level=NORMAL Aviation Color Code=GREEN Mauna Kea volcano Hawaii and Pacific Ocean HI 19.82 -155.47 CAVW=1302-03-