USGS Volcano Alerts

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Recent Volcano Observatory Activity Reports

  • : AVO Cleveland YELLOW/ADVISORY - Moderately elevated surface temperatures in satellite images during the week - Recent Volcano Observatory Activity Reports
    Aug 23, 2019 21:54 - Moderately elevated surface temperatures were observed on five days over the past week at Cleveland. Seismicity has been mostly quiet with only a few small earthquakes detected near the volcano. There was nothing significant noted in local or regional infrasound data during the week. Additional episodes of lava effusion and explosions are likely and will occur without advance warning. The most recent explosion of Cleveland occurred on January 9, 2019. These explosions are normally short duration and only present a hazard to aviation in the immediate vicinity of the ...
  • : AVO Semisopochnoi ORANGE/WATCH - Low-level eruption continues with tremor and steam and SO2 plumes - Recent Volcano Observatory Activity Reports
    Aug 23, 2019 21:54 - A low-level eruption involving both steam and magma continues at Semisopochnoi. Seismic activity at Semisopochnoi remains elevated with unsteady tremor and low-frequency earthquakes. Ground-coupled airwaves, indicative of explosive activity, have been seen at times in seismic data. Seismic data transmission from stations on the island was interrupted during the week but has returned in the past day. Semisopochnoi was mostly obscured by clouds during the week; however, emissions of sulfur dioxide were detected on Wednesday and Thursday and a steam plume was observed on ...
  • : AVO Shishaldin ORANGE/WATCH - Low-level eruption continues with tremor and elevated surface temperatures during week - Recent Volcano Observatory Activity Reports
    Aug 23, 2019 21:54 - Low-level eruption continues at Shishaldin. Seismicity remains elevated with steady tremor recorded continuously throughout the week. Satellite data have shown elevated surface temperatures at the summit crater most days over this past week. A spatter cone has grown in and partially filled the summit crater. Last Saturday, a video taken by NOAA during an overflight showed repetitive minor explosive activity within the summit crater, typical of a low-level eruption. It remains possible that activity could increase rapidly and with little warning. Shishaldin is ...
  • : AVO Veniaminof YELLOW/ADVISORY - Weak seismic unrest and elevated surface temperatures over past week - Recent Volcano Observatory Activity Reports
    Aug 23, 2019 21:54 - Low-level seismicity continues barely above background with occasional low-frequency earthquakes occurring throughout the week. Weakly elevated surface temperatures, consistent with slowly cooling lava flows, were observed on four days over the past week at the volcano. Veniaminof volcano is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to a more significant explosive eruption. AVO combines seismic, infrasound, lightning, and satellite data for rapid detection of such events.
  • : CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels. - Recent Volcano Observatory Activity Reports
    Aug 23, 2019 15:14 - 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: A quiet week in the Cascades. There were a few small earthquakes at Mounts Hood, St. Helens, and Rainier, all very shallow (up to 2 km depth), and all M1 or smaller. Field crews have been out mapping in the Oregon Cascades and at ...
  • : HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Deformation and seismicity rates remain slightly elevated. - Recent Volcano Observatory Activity Reports
    Aug 22, 2019 18:08 - Activity Summary: Mauna Loa Volcano is not erupting. Over the past week, rates of deformation and seismicity continue to remain slightly elevated. Observations: During the past week, approximately 40 small-magnitude earthquakes (all less than M2.3) were detected beneath the summit and upper Southwest Rift Zone. Most of the earthquakes occurred at shallow to intermediate depths of less than 10 km (~6 miles) below ground level. Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) measurements show continued summit inflation, ...
  • : CALVO GREEN/NORMAL - Activity Update: Volcanoes monitored by CalVO show normal levels of background seismicity and ... - Recent Volcano Observatory Activity Reports
    Aug 12, 2019 18:20 - 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 July 1, 2019 (0000h PST) through July 31, 2019 (2359h PST): Mt Shasta: ...
  • : HVO Kilauea GREEN/NORMAL - Low activity: no lava; slow inflation of summit + middle ERZ;water pooling in summit crater - Recent Volcano Observatory Activity Reports
    Aug 6, 2019 23:25 - Activity Summary: Kīlauea Volcano is not erupting. Monitoring data continue to show steady rates of seismicity and ground deformation, low rates of sulfur dioxide emission, and only minor geologic changes since the end of eruptive activity in September 2018. Water has begun pooling at the lowest elevations in summit crater. Currently there are two small puddles that began forming on July 25, 2019 and August 1, 2019. These puddles continue to slowly expand and deepen. Observations: Monitoring data have shown no significant changes in volcanic activity over the past ...
  • : HVO Loihi Seamount UNASSIGNED/UNASSIGNED - No activity of concern for Lō‘ihi. - Recent Volcano Observatory Activity Reports
    Aug 3, 2019 00:02 - Lō‘ihi's seismic activity remained very low over the past month. Five earthquakes were detected in the vicinity of the volcano.
  • : HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai. - Recent Volcano Observatory Activity Reports
    Aug 3, 2019 00:02 - No significant activity was recorded at Hualālai Volcano over the past month. Nine earthquakes were recorded in the vicinity of the volcano. Seismic activity is back to background level following the April 13th M5.3 earthquake. HVO's continuously recording Global Positioning System (GPS) receiver atop Hualālai recorded no significant deformation over the past month.
  • : HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā. - Recent Volcano Observatory Activity Reports
    Aug 3, 2019 00:02 - No significant activity was recorded at Haleakalā Volcano over the past month. No earthquakes were recorded in the vicinity of the volcano. The continuously recording Global Positioning System (GPS) instrument atop Haleakalā recorded no significant deformation during this time.
  • : HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea. - Recent Volcano Observatory Activity Reports
    Aug 3, 2019 00:02 - No significant activity was detected at Mauna Kea Volcano over the past month. 15 earthquakes were detected in the vicinity of the volcano. A single, continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (operated by NASA’s Jet Propulsion Laboratory) recorded no significant changes in deformation during this time.
  • : YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: background seismicity and deformation - Recent Volcano Observatory Activity Reports
    Aug 1, 2019 16:09 - Recent work and news In July 2019, Steamboat geyser returned to more “normal” (at least since 2018) patterns, with water eruptions occurring on a near-weekly schedule. During the month, 5 water eruptions occurred, on July 4, 10, 18, 24, and 30, bringing the total number of eruptions for the year to 30. University of Utah and National Park Service scientists recovered a network of 51 temporary seismometers around Steamboat geyser in mid-July after having captured several eruptions. Data from these temporary seismometers should provide new insights into how Steamboat ...

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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 20th year, author of multimedia CDs and DVDs, loves the outdoors, his family, his geeky skill-set, and lives in rural Missouri, just a few miles from the Big Muddy. Always ready to help others, he shares what he learns on multiple blogs, 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. Since 1997, he has provided guidance, authentic government survival history, and commentary on why we all need to get ready for that fateful day in the future, when we have to get our hands dirty and step in to save the day. He is an award winning videographer (2005 Telly Award), has received state and national scholarly recognition (2006 New Century Scholar and All USA Academic Team), and is a natural with computers, technology, gadgets, small furry mammals, and anything on wheels. Rich likes making friends, solving problems, and creating solutions to everyday issues. He doesn't mind mixing things up, when there is a teaching moment ready to happen. As a constitutional conservative, he's staying quite busy these days. The SurvivalRing Radio Show at www.survivalringradio.com will be coming back SOON!

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