Volcano Watch — What sounds the (automated) alarms at HVO?
Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates. Example plots of STA/LTA alarm on infrasound data for four possible alarm scenarios. A shows detection of a real eruption, B shows a false detection of non-volcanic change, C shows failure to detect a real eruption amid noisy data, and D shows no detection of any event of interest. Because it can be very expensive to have scientists watch the volcano data streams on a 24-hour basis, HVO computers are ‘trained’ to look for activity and alert when the volcano