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U.S. Volcanoes and Current Activity Alerts

Activity Alerts:
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Volcano Status:
Elevated | Normal | Unassigned
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  • Altered rhyolite lava flows at the Grand Canyon of the Yellowstone, Yellowstone National Park
    Altered rhyolite lava flows at the Grand Canyon of the Yellowstone, Yellowstone National Park
    Altered rhyolite lava flows at the Grand Canyon of the Yellowstone, Yellowstone National Park
  • A 100-m-diameter lake fills a hydrothermal explosion crater (Holocene age) north of "The Gap".
    A 100-m-diameter lake fills a hydrothermal explosion crater (Holocene age) north of "The Gap".
    A 100-m-diameter lake fills a hydrothermal explosion crater (Holocene age) north of "The Gap".
  • An image from a HALEMAUMAU time-lapse camera taken on December 5 at 4:41 am, just after the collapse. The portion of the rim that fell into the HALEMAUMAU lava lake triggered intense spattering on the
    An image from a HALEMAUMAU time-lapse camera taken on December 5 at 4:41 am, just after the collapse. The portion of the rim that fell into the HALEMAUMAU lava lake triggered intense spattering on the
    An image from a Halema‘uma‘u time-lapse camera taken on December 5 at 4:41 am, just after the collapse. The portion of the rim that fell into the Halema‘uma‘u lava lake triggered intense spattering on the
  • Channelized breakouts on the pali
    Channelized breakouts on the pali
    Channelized breakouts on the pali

Read Our Two Weekly Volcano Observatory Science Articles

Scientists within the USGS Volcano Hazards Program operate from within five U.S. volcano observatories. One of the primary goals of the observatories is to be an authoritative source for enlightening information about our Nation's volcanoes.

The Hawaiian Volcano Observatory (HVO), the oldest of the five, has a long history of writing regular articles about volcanic activity and scientific research on the Hawaiian volcanoes. HVO's weekly article, "Volcano Watch," entered its 27th year of publication in November 2017. The entire catalog of articles can be accessed and searched on their website. New articles are published every Thursday afternoon.

Taking lead from HVO, the Yellowstone Volcano Observatory (YVO), the newest of the five observatories, began a weekly article on the first day of 2018. This new column—the "Yellowstone¬†Caldera Chronicles"—is posted each Monday on the homepage of YVO's website . Like HVO's Volcano Watch series, the YVO Chronicles are peer-reviewed and edited before publication.

If you are interested in learning more about a specific topic related to Yellowstone or Hawaiian volcanism, please contact us. We will certainly answer, and you may see a longer-winded answer in a future Volcano Watch or Yellowstone Caldera Chronicle article.



Volcanic Unrest is Persistent in Alaska and Hawaii

The Alaska Volcano Observatory website (AVO) includes complete information about volcanoes in Alaska.
  • Mount Cleveland, located in the central Aleutian Islands, has been in a state of volcanic unrest since June 17, 2015. Explosive eruptions can send ash to altitudes hazardous to aviation.
The Hawaiian Volcano Observatory website offers information about volcanoes in Hawaii.
  • Kīlauea Volcano on the Island of Hawai‘i has been erupting from its East Rift Zone nearly continuously since 1983. Lava flowing into the Pacific Ocean presentsocean entry hazards to visitors. A second eruption began at the summit of Kīlauea in 2008 where an active lava lake produces occasional explosions and gas emissions that create Statewide vog hazards.
  • Mauna Loa Volcano on the Island of Hawai‘i began showing signs of unrest in 2014, and the volcano alert level and aviation color code were raised on September 17, 2015. Elevated rates of earthquakes and ground deformation persist and HVO continues to monitor the volcano closely.