News

After damaging earthquakes, response and recovery takes place under the threat of aftershocks. USGS aftershock forecasts can help you understand what...

The last eruption of Mauna Loa occurred in 1984 and began in a style typical of the volcano. At 10:55 p.m. on March 24, 1984, the rate of earthquakes...

Photos and videos of the Hawaiian Volcano Observatory response to seismic unrest in American Samoa, recent activity on Kīlauea volcano, and fieldwork...

Covering over half of the Island of Hawai‘i, Mauna Loa is sometimes referred to as a “sleeping giant” because it hasn’t erupted in 38 years after...

Recent Sentinel-1 interferogram for the period from June 7 to July 13, 2022, covering the Island of Hawai‘i. 

Frank A. Trusdell, a research geologist at the U.S. Geological Survey's Hawaiian Volcano Observatory (HVO), recently received a Meritorious Service...

The Hawaiian Volcano Observatory conducted a geology monitoring overflight of Kīlauea summit on July 19, 2022.

What makes a volcano a volcano? This was the topic of a “Volcano Watch” article about 20 years ago. Recent questions from visitors suggest this...

Hawaiian Volcano Observatory Special Reports published in 1912, 1917, 1938, 1949, and 1950 have been added to the USGS Publications Warehouse and made...

Heraklion is the largest city on the island of Crete in Mediterranean Sea. The island isn’t volcanic, but other Greek islands dotting the sea surface...