News

HVO has updated the Geology & History webpages for Kīlauea and Mauna Loa volcanoes. These pages now include maps and links to revised tables...

Mauna Loa summit mission-critical fieldwork: MultiGAS installation

Many messages to AskHVO (askHVO@usgs.gov) request resources relating to geologic maps and geographic information systems (GIS) data. "Is there a map...

Mauna Loa summit shadow

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...