The Hawaiian Volcano Observatory celebrated the 30th anniversary of Mauna Loa's last eruption (in 1984) on March 25, 2014, underscoring that it has been a realtively quite 3 decades at the world's largest active volcano.
A tiltmeter, is a type of instrument used to detect any kind of tilt in the structure to which it is attached. Most tiltmeters use an air bubble in a liquid-filled tube, much like a typical carpenter's level, but are equipped with sensitive electronics that can detect even the tiniest change in tilt. They either sound an alarm or transmit the data to a remote monitor or other device.
An incentive spirometer is a device that provides exercise to the lungs. It does this by encouraging deep breaths with the movement of the diaphragm, the muscle between the lungs and abdomen (tummy). Deep breathing exercises help open the air sacs in the lungs and may reduce the risk of: