• Series of earthquakes under Mount St. Helens, Washington

    A series of small to moderate earthquakes shook Mount St. Helens volcano in Washington over the past couple of days. The largest was M3.9 at a depth of 10.2 km (6.2 miles) on January 3, 2018, followed by M2.7, M2.0 and M1.9. The quakes are believed to be tectonic in…

  • The Weekly Volcanic Activity Report: December 20 – 26, 2017

    New activity/unrest was reported for 5 volcanoes between December 20 and 26, 2017. During the same period, ongoing activity was reported for 10 volcanoes. New activity/unrest: Agung, Bali (Indonesia) | Bezymianny, Central Kamchatka (Russia) | Kanlaon, Philippines |…

  • The Weekly Volcanic Activity Report: December 13 – 19, 2017

    New activity/unrest was reported for 7 volcanoes between December 13 – 19, 2017. During the same period, ongoing activity was reported for 12 volcanoes. New activity/unrest: Agung, Bali (Indonesia) | Bezymianny, Central Kamchatka (Russia) | Kanlaon, Philippines |…

  • Volcanic earthquakes at Kanlaon surge to 1 217, Philippines

    The Kanlaon volcano's seismic network recorded 1 217 volcano earthquakes on December 14, 2017, an uptick from already unusually high 578 recorded on December 13. Wispy emission of white steam-laden plumes were observed coming from the summit crater, PHIVOLCS…