Mauna Loa eruption information


Mauna Loa is no longer erupting. Lava supply to the fissure 3 vent on the Northeast Rift Zone ceased on December 10 and sulfur dioxide emissions have decreased to near pre-eruption background levels. Volcanic tremor and earthquakes associated with the eruption are greatly diminished.

Accordingly, the USGS Hawaiian Volcano Observatory (HVO) is lowering the Volcano Alert Level for ground-based hazards from WATCH to ADVISORY and the Aviation Color Code from ORANGE to YELLOW.

Spots of incandescence may remain near the vent, along channels, and at the flow front for days or weeks as the lava flows cool. However, eruptive activity is not expected to return based on past eruptive behavior.

Daniel K. Inouye highway remains open in both directions. All areas adjacent to Daniel K. Inouye highway, Old Saddle road, and near the lava flow are closed and prohibited from access to the public for your safety.

This situation could change. For the most up-to-date information please see the following list:

Hawaii County –

Sign up for alerts on the Hawaii County website. They use the Everbridge app. It is free and easy to sign up (

Follow County of Hawaii Civil Defense on Twitter for the latest updates @CivilDefenseHI


USGS (United States Geological Survey)

For the latest on the status of the eruption. For the latest updates follow them on Twitter @USGSVolcanoes

Interagency Vog Dashboard –

For information on air quality