Current Alerts for U.S. Volcanoes

  • 2014-10-30 18:17:47 Kilauea Warning Orange
  • 2014-10-30 12:40:25 Shishaldin Watch Orange
  • 2014-10-30 12:40:25 Cleveland Advisory Yellow
  • 2014-10-31 10:03:44 Pagan Advisory Yellow
  • 2014-10-24 10:04:38 Cascade Range Normal Green
  • 2014-10-15 13:59:44 Haleakala Normal Green
  • 2014-10-15 14:02:49 Hualalai Normal Green
  • 2014-10-24 12:10:14 Katmai Normal Green
  • 2014-10-15 14:06:13 Mauna Kea Normal Green
  • 2014-10-15 13:57:03 Mauna Loa Normal Green
  • 2014-10-01 12:28:31 Yellowstone Normal Green
  • 2014-10-15 14:04:40 Lo`ihi Unassigned Unassigned

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Monday, October 27, 2014 2:07 PM PDT (Monday, October 27, 2014 21:07 UTC)

54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

The elevated low-level eruptive activity of the past several days continues. In the past 24 hours, ongoing seismic tremor has been accompanied by weak thermal anomalies at the summit as observed in several partly cloudy satellite images.

52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

No activity was observed in mostly cloudy satellite and webcam images in the past 24 hours. Seismicity remains at low levels.


Other Alaska volcanoes show no signs of significant unrest:

AVO scientists conduct daily checks of earthquake activity at all seismically-monitored volcanoes, examine web camera and satellite images for evidence of airborne ash and elevated surface temperatures, and consult other monitoring data as needed.

For definitions of Aviation Color Codes and Volcano Alert Levels, see:





John Power, Scientist-in-Charge, USGS (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI (907) 322-4085

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.

AVO Alert Archive Search
Friday, October 24, 2014 10:04 AM PDT (Friday, October 24, 2014 17:04 UTC)

Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal levels of background seismicity. 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: Activity remained at background levels for Cascade Range volcanoes during the past week although storms generated noise on monitoring systems. Field crews made instrument site visits to Mount Hood and Yellowstone.

Mount St. Helens Seismic Information
CVO Alert Archive Search
Thursday, October 30, 2014 6:17 PM HST (Friday, October 31, 2014 04:17 UTC)

19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WARNING
Current Aviation Color Code: ORANGE

Scientists of the USGS Hawaiian Volcano Observatory conducted ground observations of the June 27th lava flow on Thursday, October 30, 2014. As of 5 PM, HST, the leading edge of the flow had stalled approximately 155 meters (170 yards) in a straight line distance from Pāhoa Village Road. The flow advanced only about 30 meters (33 yards) over the past 24 hours. The leading edge is inflated with a few small oozing breakouts just behind the flow front, however, so it is possible that the flow may advance again without warning.

A new outbreak of lava occurred from the northern margin of the lava flow in a forested area about 100 meters (110 yards) downslope (northeast) of the Pāhoa cemetery. This flow was moving downslope along the north margin of the existing flow as of 5 PM. This breakout is now the major locus of activity on the lower part of the June 27th lava flow field.

The breakout of lava on the north margin of the flow above Apa`a Street, near the Pāhoa transfer station, is still active, and the dominant part of the breakout was advancing at a rate of 7-8 meters (8-9 yards) per hour. This lobe was about 100 meters (110 yards) upslope of Apa`a Street at 5 PM.

DI deflation continued at the summit, having accumulated about 2.5 microradians of deflationary tilt since Wednesday afternoon. The deflation was accompanied by a several-meter (yard) drop in the level of the summit lava lake as is typical for such events. Deflation during DI events is often associated with a decrease in the eruption rate of lava from Puʻu ʻŌʻō, which may result in a decrease in the level of activity at the flow front in the coming days. An instrumental malfunction at the tiltmeter located on Puʻu ʻŌʻō is temporarily preventing an analysis of ground tilt there.

Daily updates about Kīlauea's ongoing eruptions, recent images and videos of summit and East Rift Zone volcanic activity, and data about recent earthquakes are posted on the HVO Web site at

HVO scientists will continue to monitor the flow from the ground overnight and Friday, and an overflight is scheduled for Friday morning. A daily update will be posted in the morning, and status reports will be issued as new information becomes available. Updates are posted at

Additional Information:

For a definition of volcano alert levels and aviation color codes:

Maps, photos, Webcam views, and other information about Kīlauea Volcano are available at A daily update summary is available by phone at (808) 967-8862.

A map with details of earthquakes located within the past two weeks can be found at

HVO Contact Information:

The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawai`i.

HVO Alert Archive Search
Monday, October 6, 2014 12:50 PM PDT (Monday, October 6, 2014 19:50 UTC)

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 September 1, 2014 (0000h PDST) through September 30, 2014 (2359h PDST):
Mt Shasta:: Only one M1.14 earthquake was detected this month. However, on the afternoon of September 20, a large volume of water surged down Mount Shasta's south flank into Mud Creek, entraining debris and inundating the drainage and roads near McCloud, California. USGS CalVO seismologists determined that the event was not triggered by volcanic or seismic activity. The preliminary assessment of scientists at the Shasta-Trinity National Forest is that the debris flow was triggered by rapid release of melting subglacial water from the Konwakiton Glacier and/or rapid release of ponded water from the adjacent Summit Plateau.
Medicine Lake: Three earthquakes of M1.0 or greater were detected. The largest registered was a M1.95.
Lassen Volcanic Center: Three earthquakes of M1.0 or greater were detected. The largest registered was a M1.76.
Clear Lake Volcanic Field: Five earthquakes of M1.0 or greater were detected. The largest registered was a M1.90. [Note: Typical high level of seismicity was observed under the Geysers steam field located at the western margin of CLVF. The largest registered was a M2.72].
Long Valley Volcanic Region: From September 25th to the 28th a robust earthquake swarm occurred in Long Valley Caldera approximately 7 miles east of the town of Mammoth Lakes. During the swarm, there were more than 600 earthquakes of magnitude M1.0 or greater, and over 100 above magnitude M2.0, including five above magnitude M3.0 (maximum M3.54, revised from preliminary value of M3.8). There was no evidence for anomalous ground deformation attributable to subsurface magma migration. Only two small earthquakes were detected along the Mono-Inyo chain, the largest of which was a M1.52. No earthquakes of M1.0 or greater were detected under Mammoth Mountain. [Note: The typical high level of seismicity was observed south of the caldera in the Sierra Nevada range. The largest registered was a M1.98].
Ubehebe Craters: No earthquakes at or above M1.0 were detected.
Salton Buttes: The typical high level of seismicity was observed in the vicinity of the buttes, with seven earthquakes of M1.0 or greater. The largest registered M2.65.
Coso Volcanic Field: The typical high level of seismicity was observed, with fourteen earthquakes M1.0 or greater. The largest registered M3.10.

The U.S. Geological Survey will continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted. For a definition of alert levels see

As part of the U.S. Geological Survey's Volcano Hazards Program, the California Volcano Observatory aims to advance scientific understanding of volcanic processes and lessen the harmful impacts of volcanic activity in the volcanically active areas of California and Nevada. For additional USGS CalVO volcano information, background, images, and other graphics visit For general information on the USGS Volcano Hazard Program Statewide seismic information for California and Nevada can be found at

CalVO Alert Archive Search
Friday, October 24, 2014 5:09 PM PDT (Saturday, October 25, 2014 00:09 UTC)

Report prepared by the U.S. Geological Survey.

18°7'48" N 145°48' E, Summit Elevation 1870 ft (570 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Seismic, infrasound, and web camera data from Pagan Volcano are temporarily unavailable. A typical steam and gas plume was observed in some satellite images over the past week.

Volcanic gas from Pagan may be noticed downwind of the volcano as a distinctive sulfurous odor. Additional information about volcanic gas and vog can be found on the web at this address:

Access to the island may be restricted by the CNMI government. Contact the EMO for the latest information.


Other Northern Mariana Island volcanoes volcanoes show no signs of significant unrest.
USGS conduct daily checks of earthquake activity at Pagan, Sarigan, and Anatahan volcanoes.

For definitions of Aviation Color Codes and Volcano Alert Levels, see:


USGS Northern Mariana Duty Scientist (808) 967-8815

CNMI Homeland Security and Emergency Management Office (670) 664-2216

NMI Alert Archive Search
Wednesday, October 1, 2014 12:28 PM MDT (Wednesday, October 1, 2014 18:28 UTC)

44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN


During September 2014, the University of Utah Seismograph Stations reports 71 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a small earthquake of magnitude 3.2 on September 24, at 3:41 AM MDT, located about 9 miles south of Mammoth, YNP. There were no earthquake swarm sequences during the month of September.

Yellowstone earthquake activity in September is at low background levels.

Ground deformation

Deformation in north-central Yellowstone continues, although the subsidence rate at the NRWY GPS station has slowed considerably. The total subsidence now comes close to matching the amount of uplift that had occurred previous to April 2014.

Caldera GPS stations continue to record the pattern of uplift that has persisted since the beginning of 2014. An example can be found at: (click on Static Plots / Time Series)

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.

YVO Member agencies: USGS, Yellowstone National Park, University of Utah, University of Wyoming, UNAVCO, Inc., Wyoming State Geological Survey, Montana Bureau of Mines and Geology, Idaho Geological Survey

Jacob Lowenstern, Scientist-in-Charge

YVO Alert Archive Search