News

The Hawaiian Volcano Observatory has monitored, studied, and served as an information source about Hawaiian volcanism for the past 100 years.

Satellite image shows active surface flows.

Long-term change at MLK vent

In 1987, to commemorate the 75th anniversary of the founding of the Hawaiian Volcano Observatory (HVO), over 400 Earth scientists from around the...

Seldom does one find evidence of an eruption where none was known before. We generally assume that Kīlauea erupts only at the summit or along its two...

Tuesday morning, July 31, started as a typical office day at the Hawaiian Volcano Observatory (HVO). Beginning at 10:25 a.m., a number of text...

Small, scattered breakouts on flow field.

At 3:45 a.m., Friday, July 19, 1974, a flurry of earthquakes on Kīlauea triggered the USGS Hawaiian Volcano Observatory's "tremor alarm." In response...

Summer is the time when most CalVO scientists get out into the field to conduct geologic and ground-based monitoring investigations of our regional...

Most of us think of gravity as a constant. Students of physics know that gravitational acceleration is 9.8 m per second-squared (32 ft/s/s), while the...