News

Mauna Loa, the largest active volcano on Earth, has erupted, on average, every 5–6 years during the past 3,000 years.

In the past, HVO would occasionally post images of people collecting lava samples on our website. These photos usually featured a person (with little...

Snow at Mauna Loa summit

Last week's Volcano Watch provided details of events leading up to the dropping of bombs on a Mauna Loa lava flow on December 27, 1935. Here's the...

In late February 2020, Hawaii media reported on the recent discovery of two bombs on the north flank of Mauna Loa, but details were lacking. Today, we...

The origin(s) of volcanic ash deposits on the Island of Hawai‘i have been an enigma, especially those found on and between Kīlauea and Mauna Loa. We...

Interferogram shows range change at Mauna Loa and Kīlauea
 

Interferogram shows range change at Mauna Loa and Kīlauea

Snowfall at Mauna Loa summit

Clear Views of Mauna Loa on Kīlauea summit overflight

Neither Kīlauea nor Mauna Loa erupted in 2019, but this period of relative quiet must not lead to complacency about Hawaii's two most active volcanoes...