On Thursday, September 17, 2015, the Volcano Alert Level and Aviation Color Code for Mauna Loa was elevated to Advisory/Yellow based on long-term trends in both earthquake and deformation monitoring data.
Mauna Loa is not erupting. The seismicity rate continues above background, though it has not increased above rates observed in recent months. In the last week, earthquakes occurred mostly beneath Mauna Loa’s upper Southwest Rift Zone at depths less than 5 km (3 miles). Continuous GPS measurements continue to show deformation consistent with inflation of magma reservoirs beneath the summit of Mauna Loa Volcano.
December 14, 2015. Mauna Loa, Hawaï:
19°28’30 » N 155°36’29 » W,
Summit Elevation 13681 ft (4170 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW
Source : HVO .
Photo : An aerial view of the 1940 cinder-and-spatter cone on the floor of Mauna Loa’s summit caldera as seen from the southeast. The west wall of the caldera (background) is about 170 m (560 feet) high. Most of the caldera floor around the cone is covered by lava flows erupted in 1984. , Peterson / USGS 1975