Current Alerts for U.S. Volcanoes

  • 2016-02-09 09:03:21 Kilauea Watch Orange
  • 2016-02-08 12:08:20 Cleveland Advisory Yellow
  • 2016-02-04 09:11:04 Mauna Loa Advisory Yellow
  • 2016-02-08 12:08:20 Shishaldin Advisory Yellow
  • 2016-01-24 09:29:30 Augustine Normal Green
  • 2016-02-05 13:59:54 Cascade Range Normal Green
  • 2016-02-04 11:37:21 Haleakala Normal Green
  • 2016-02-04 11:37:21 Hualalai Normal Green
  • 2016-02-04 11:37:21 Mauna Kea Normal Green
  • 2016-02-01 10:43:48 Yellowstone Normal Green
  • 2016-02-04 11:37:21 Lo`ihi Unassigned Unassigned
  • 2016-01-30 10:08:13 Pagan Unassigned Unassigned

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Monday, February 8, 2016 12:08 PM AKST (Monday, February 8, 2016 21:08 UTC)

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

Nearly continuous, low-level seismic tremor, as well as small discrete events and very small explosions, continued during the past 24 hours at levels above background for Shishaldin. No activity was observed in clear to 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 significant activity observed in partly cloudy satellite images during the past day and no unusual seismic activity was detected. The Cleveland Volcano web camera remains inoperable.


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, February 5, 2016 1:59 PM PST (Friday, February 5, 2016 21:59 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 background levels of 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: Monitoring data indicate that activity remained at background levels throughout the week. Field crews were at Newberry and Crater Lake volcanoes this week performing maintenance on seismic and GPS stations.

CVO Alert Archive Search
U.S. Geological Survey
Tuesday, February 9, 2016 9:03 AM HST (Tuesday, February 9, 2016 19:03 UTC)

This report on the status of volcanic activity at Kīlauea was prepared by the USGS Hawaiian Volcano Observatory (HVO). All times are Hawaii-Aleutian Standard Time.

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

Activity Summary: Eruptive activity continues at Kīlauea Volcano’s summit and East Rift Zone. Seismicity and deformation rates throughout the volcano remain at background levels. Scattered lava flow activity continues on the June 27th lava flow field within about 6 km (4 mi) northeast of Puʻu ʻŌʻō. These flows currently pose no threat to nearby communities.

Summit Observations: The lava lake within the Halemaʻumaʻu Overlook crater remains active and was measured at 37 m (122 ft) below the crater rim when it was last measured on Monday, February 8, 2016. Tiltmeters at Kīlauea's summit have recorded inflationary tilt. Seismicity is within normal, background rates with tremor fluctuations associated with lava lake spattering. The summit sulfur dioxide emission rate averaged 5,300 metric tons/day on January 21 and 22.

Puʻu ʻŌʻō Observations: Webcam images over the past 24 hours show persistent glow at long-term sources within the crater and from skylights in the lava tube on the northeast flank of the cone. A small flow spilled out onto the crater floor from the eastern vent last night. Seismic activity remains low at Puʻu ʻŌʻō. A tiltmeter on the cone recorded no significant change in tilt over the past day. The sulfur dioxide emission rate from all East Rift Zone vents was about 345 metric tons/day when it was last measured on February 2, 2016.

June 27th Lava Flow Observations: Webcam images show continued surface flow activity on the June 27th flow field, with smoke plumes where lava is igniting forest. The active flows are confined to within about 6 km (4 mi) northeast of Puʻu ʻŌʻō and are not currently threatening any nearby communities.



Daily Activity Summary also available by phone: (808) 967-8862

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Webcam images:


Lava Flow Maps:

Definitions of terms used in update:

Sulfur dioxide emission rate discussion:

Overview of Kīlauea summit (Halemaʻumaʻu) and East Rift Zone (Puʻu ʻŌʻōŤ) eruptions:

Summary of volcanic hazards from Kīlauea eruptions:

Recent Earthquakes in Hawai'i (map and list):

Explanation of Volcano Alert Levels and Aviation Color Codes:

Lava viewing information:
Hawai'i Volcanoes National Park:

HVO Contact:

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
U.S. Geological Survey
Monday, February 1, 2016 10:17 AM PST (Monday, February 1, 2016 18:17 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 January 1, 2016 (0000h PST) through January 31, 2016 (2359h PDT):
Mt Shasta: No earthquakes at or above M1.0 were detected.
Medicine Lake: No earthquakes at or above M1.0 were detected.
Lassen Volcanic Center: Eleven M1.0 or greater earthquakes were detected, with the largest registering M2.26. Many of these events occurred during two minor seismic swarms on January 2, 2016 near the Shasta-Tehama-Plumas County lines about 12 km northeast of the town of Mineral and on January 10-11, 2016 near the Tehama-Plumas County line about 15 km east of the town of Mill Creek.
Clear Lake Volcanic Field: Two earthquakes of M1.0 or greater were detected. The largest was M1.18. [Note: The typical high level of seismicity was observed under the Geysers steam field located at the western margin of CLVF. The largest event was M2.95].
Long Valley Volcanic Region: In Long Valley Caldera, 7 earthquakes of M1.0 or greater were detected. The largest event registered M1.81. In the Mono Craters region, 5 earthquakes of M1.0 or greater were detected, with the largest registering M2.59. One earthquake of M1.0 or greater was detected under Mammoth Mountain (M1.16). [Note: The typical high level of seismicity was observed south of the caldera in the Sierra Nevada range. The largest event registered M2.17].
Ubehebe Craters: No earthquakes at or above M1.0 were detected.
Salton Buttes: Three earthquakes of M1.0 or greater were detected. The largest registered M2.06.
Coso Volcanic Field: The typical high level of seismicity was observed, with 9 earthquakes M1.0 or greater. The largest registered M2.31.

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, February 5, 2016 12:05 PM ChST (Friday, February 5, 2016 02:05 UTC)

Report prepared by the U.S. Geological Survey.

No eruptive activity or significant unrest has been detected at volcanoes in Northern Mariana Islands this week.


Seismic activity is monitored in real time at 2 volcanoes in the Commonwealth of the Northern Mariana Islands. Satellite images of CNMI volcanoes are analyzed for evidence of volcanic ash and gas plumes. Some volcanoes may currently display anomalous behavior but are not considered to be at a dangerous level of unrest. Anatahan volcano is in color code GREEN and volcano alert level Normal and is at or near normal levels of background seismicity. Sarigan Volcano has one seismic station and is designated as UNASSIGNED. All other volcanoes in the CNMI including Farallon de Pajaros, Supply Reef, Maug, Asuncion, Agrigan, Pagan, Alamagan, and Guguan are unmonitored seismically and are designated UNASSIGNED. USGS did not detect volcanic ash or gas plumes in the vicinity of any of these volcanoes.

The USGS conducts daily seismic checks on data from four seismic stations on Anatahan and one seismic station on Sarigan as well as an infrasound array on Sarigan when data streams are available. Seismic data from three seismic stations on Anatahan were restored on December 8, 2015. The seismic station on Sarigan is currently not functioning and data are unavailable.

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

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
Monday, February 1, 2016 10:43 AM MST (Monday, February 1, 2016 17:43 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 January 2016, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 70 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a micro earthquake of magnitude 2.5 on January 30, 11:18 PM MST, located 5 miles south southwest of Lake, WY.

January 2016 seismicity was characterized by two earthquake swarms.

1) A small swarm of 16 earthquakes occurred January 30 - 31 (MST) 5 miles south southwest of Lake, WY. The swarm includes the largest earthquake in January (described above).

2) A smaller swarm of 10 earthquakes occurred January 25 - 27. The largest swarm earthquake (magnitude 2.0) occurred January 26, 05:59 AM MST, located 14 miles north northwest of Lake, WY.

Earthquake sequences like these are common and account for roughly 50% of the total seismicity in the Yellowstone region.

Overall, Yellowstone earthquake activity in January was within background levels.

Ground deformation

GPS stations in Yellowstone continue to show little or no ground movement. (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