USGS Volcano Alerts

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Rich

Recent Volcano Observatory Activity Reports

  • : CVO Mount Hood GREEN/NORMAL - Magnitude 3.9 earthquake ~4 km south of Mount Hood at 2051 PDT - Recent Volcano Observatory Activity Reports
    Jun 6, 2021 04:38 - At 20:51 PDT on June 5 (0351 UTC on June 6) a M 3.9 earthquake occurred ~4 km south of the summit of Mount Hood at a depth of 4.3 km below sea level that was felt in the vicinity around Mount Hood. It was preceded by several earthquakes in the hour prior to the M 3.9, and tens of aftershocks have occurred so far with event rates declining in a manner typical of mainshock-aftershock sequences. The mainshock characteristics and location are consistent with past swarms in the Mount Hood area, including a M 4.5 on June 29, 2002, that was located ~1 mile east of the M 3.9. ...
  • : HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai. - Recent Volcano Observatory Activity Reports
    Jun 4, 2021 00:40 - No significant activity was recorded at Hualālai Volcano during the past month. There were 7 small-magnitude earthquakes—all less than M2.0—detected in the vicinity of the volcano. This earthquake count is on par with previous months.
  • : HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā. - Recent Volcano Observatory Activity Reports
    Jun 4, 2021 00:40 - No significant activity was recorded at Haleakalā Volcano during the past month. There were no earthquakes detected in the vicinity of the volcano. The continuously recording Global Positioning System (GPS) receiver atop Haleakalā (MAUI) recorded no significant deformation.
  • : YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: background seismicity and deformation - Recent Volcano Observatory Activity Reports
    Jun 1, 2021 17:46 - Recent work and news In the past month there were two major water eruptions of Steamboat Geyser, on May 5 and 31. This brings the total number of eruptions for the year to 12. During the month of May, Yellowstone Volcano Observatory scientists installed 15 semi-permanent GPS stations in and around Yellowstone National Park. These stations are deployed every spring and recovered in the fall, operating during the period of largely snow-free conditions, and they serve to augment the network of continuous GPS stations, which operate year-round. Scientists also ...
  • : HVO Loihi Seamount UNASSIGNED/UNASSIGNED - No activity of concern for Lō‘ihi. - Recent Volcano Observatory Activity Reports
    Jun 4, 2021 00:40 - No significant activity was recorded at Lō‘ihi Volcano during May 2021. There were 2 small-magnitude earthquakes—both less than M2.0—detected in the vicinity of the volcano. A M4.0 earthquake occurred under Lō‘ihi on June 2, accompanied by a minor cluster of smaller earthquakes.
  • : HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea. - Recent Volcano Observatory Activity Reports
    Jun 4, 2021 00:40 - No significant activity was recorded at Mauna Kea Volcano during the past month. There were 11 small-magnitude earthquakes—all less than M2.0—detected in the vicinity of the volcano, most of which occurred above 23 kilometers (approximately 14 miles) below sea level. The total earthquake count is similar to the previous month (14). The continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (MKPM, operated by NASA’s Jet Propulsion Laboratory) recorded no significant deformation, but is missing two weeks of data.
  • : CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels. - Recent Volcano Observatory Activity Reports
    Jun 18, 2021 15:57 - Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of activity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon. Recent Observations: Minor earthquakes occurred at Mounts Rainier, St Helens, Hood, and Crater Lake over the past week. Crews have been out at Mount St. Helens this week upgrading, maintaining, and installing new monitoring stations.
  • : CALVO GREEN/NORMAL - CA volcanoes at normal background levels of seismicity and deformation during past week. - Recent Volcano Observatory Activity Reports
    Jun 22, 2021 17:12 - Monitored CALIFORNIA VOLCANOES Current Volcano Alert Level: all NORMAL Current Aviation Color Code: all GREEN Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes. Observations for June 14, 2021 (0000h PDT) through June 20, 2021 (2359h PDT): Clear Lake ...
  • : AVO Semisopochnoi YELLOW/ADVISORY - No eruptive activity detected; seismic activity low - Recent Volcano Observatory Activity Reports
    Jun 24, 2021 19:32 - No eruptive activity at the north crater of Mount Cerberus was detected over the past day. Seismic activity remains at low levels, and nothing significant was observed in regional infrasound data. No ash emissions or other outward signs of unrest were noted in mostly cloudy satellite views of the volcano. Small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10,000 ft above sea level are typical of recent activity at Semisopochnoi. Small explosions may occur without warning and could be ...
  • : AVO Cleveland YELLOW/ADVISORY - Seismic activity remains low. - Recent Volcano Observatory Activity Reports
    Jun 24, 2021 19:32 - No significant activity was observed in seismic or infrasound data over the past day. Nothing unusual was observed in mostly cloudy satellite views of the volcano over the past day. Episodes of lava effusion and explosions can occur without advance warning. Explosions from Cleveland are normally short duration and only present a hazard to aviation in the immediate vicinity of the volcano. Larger explosions that present a more widespread hazard to aviation are possible, but are less likely and occur less frequently. When operational, Cleveland volcano is monitored ...
  • : HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Seismicity remains slightly above background. - Recent Volcano Observatory Activity Reports
    Jun 24, 2021 19:12 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of seismicity at the summit remain slightly elevated and above long-term background levels. Other Mauna Loa monitoring data streams show no significant change in deformation rates or patterns that would indicate increased volcanic hazard at this time. Observations: During the past week, HVO seismometers recorded approximately 166 small-magnitude earthquakes below Mauna Loa, 37 of which were concentrated below the summit and upper-elevation flanks of the volcano, and 129 were located under the southeast flank. ...
  • : AVO Great Sitkin YELLOW/ADVISORY - No eruptive activity detected; seismic activity remains low. - Recent Volcano Observatory Activity Reports
    Jun 24, 2021 19:32 - Seismicity has remained at low levels over the past day. No eruptive activity was observed in cloudy satellite and webcam views over the past day. The prognosis for renewed eruptive activity is uncertain, although the ongoing quiescence is suggestive of a gradual return to normal background conditions. It remains possible for the level of unrest at the volcano to change quickly, and if so, additional explosive events could occur in the coming days, weeks or months. AVO is monitoring the volcano closely and will report on significant changes and observations in ...
  • : HVO Kilauea YELLOW/ADVISORY - Kīlauea Volcano is no longer erupting. No lava at the surface. Low activity levels. - Recent Volcano Observatory Activity Reports
    Jun 22, 2021 18:08 - Activity Summary: Kīlauea Volcano is no longer erupting. No surface activity has been observed by field crews or webcam images since May 23, 2021. Sulfur dioxide emission rates remain slightly elevated. It is possible that the Halema‘uma‘u vent could resume eruption or that Kīlauea is entering a longer period of quiescence prior to the next eruption. Summit Observations: The most recent sulfur dioxide (SO2) emission rates, measured on June 16, 2021, were 50 tonnes per day (t/d). SO2 emission rates are approaching levels associated with the non-eruptive period ...
  • : AVO Gareloi YELLOW/ADVISORY - No eruptive activity detected; seismic activity remains slightly elevated. - Recent Volcano Observatory Activity Reports
    Jun 24, 2021 19:32 - Slightly elevated seismicity is continuing at Gareloi volcano but the level of activity has been gradually declining and is approaching background conditions. Nothing noteworthy was observed in cloudy satellite data or webcam views of the volcano. Gareloi volcano persistently emits magmatic gases from a fumarole field on the south crater and commonly exhibits low-level seismic activity. These observations suggest the presence of shallow magma and potential interaction with a hydrothermal system. The current increase in seismicity likely reflects a change to the ...

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Updated: March 11, 2011 — 12:28 am

The Author

Rich Fleetwood

Rich is the founder of SurvivalRing, now in it's 24th year, author of multimedia CDs and DVDs, loves the outdoors, his family, his geeky skill-set, and lives in rural southern Wyoming, just below the continental divide (long story, that...). Always ready to help others, he shares what he learns on multiple blogs, many social sites, and more. With a background in preparedness and survival skills, training with county, state, and national organizations, and skills in all areas of media and on air experience in live radio and television, Rich is always thinking about the "big picture", when it comes to helping individuals and families prepare for life's little surprises.

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