Current Alerts for U.S. Volcanoes

  • 2015-07-31 12:53:44 Cleveland Watch Orange
  • 2015-07-31 08:48:03 Kilauea Watch Orange
  • 2015-07-31 12:53:44 Shishaldin Watch Orange
  • 2015-07-31 09:30:36 Pagan Advisory Yellow
  • 2015-07-31 08:30:00 Cascade Range Normal Green
  • 2015-07-14 06:38:19 Haleakala Normal Green
  • 2015-07-14 06:38:19 Hualalai Normal Green
  • 2015-07-28 20:30:09 Iliamna Normal Green
  • 2015-07-14 06:38:19 Mauna Kea Normal Green
  • 2015-07-14 06:38:19 Mauna Loa Normal Green
  • 2015-07-01 10:48:09 Yellowstone Normal Green
  • 2015-07-14 06:38:19 Lo`ihi Unassigned Unassigned

Email IconSubscribe to the Volcano Notification Service

Feed Icon Subscribe to our feed


To view the interactive volcano activity map, please visit our home page.

ALASKA VOLCANO OBSERVATORY WEEKLY UPDATE
Friday, July 31, 2015 12:53 PM PDT (Friday, July 31, 2015 19:53 UTC)


CLEVELAND VOLCANO (VNUM #311240)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Over the past few days, strongly elevated surface temperatures at Cleveland's summit, observed in satellite images, indicate the likely effusion of new lava in the summit crater. This follows the small explosion on July 21 that destroyed the dome that had formed after the last explosion, in November 2014.

A field crew working in the area has had limited observations of the summit due to clouds, but have reported no unusual activity.

No unusual seismicity related to the volcano has been detected over the past week.

Cleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The volcano is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. The most recent significant period of eruption began in February, 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft above sea level. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. Since then, Cleveland has been intermittently active producing small lava flows, often followed by explosions that generate small ash clouds generally below 20,000 ft above sea level. These explosions also launch debris onto the slopes of the cone producing hot pyroclastic avalanches and lahars that sometimes reach the coastline.

SHISHALDIN VOLCANO (VNUM #311360)
54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Low-level eruptive activity in the summit crater continues. Seismicity remained above background over the past week, and consisted of volcanic tremor and some discrete events. No elevated surface temperatures were detected by satellite, but during times of clear weather vigourous steam plumes were seen in webcam and satellite images, extending several miles from the volcano's summit.

Shishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.

OTHER ALASKA VOLCANOES

Other Alaska volcanoes show no signs of significant unrest: http://www.avo.alaska.edu/activity/

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: http://www.avo.alaska.edu/color_codes.php

FOR MORE INFORMATION ON ALASKA VOLCANOES: http://www.avo.alaska.edu

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

FOLLOW AVO ON FACEBOOK: https://facebook.com/alaska.avo

FOLLOW AVO ON TWITTER: https://twitter.com/alaska.avo

CONTACT INFORMATION:
Chris Waythomas, Acting Scientist-in-Charge, USGS
chris@usgs.gov (907) 786-7497

David Fee, Acting Coordinating Scientist, UAFGI
dfee@gi.alaska.edu (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
CASCADES VOLCANO OBSERVATORY WEEKLY UPDATE
Friday, July 31, 2015 8:30 AM PDT (Friday, July 31, 2015 15:30 UTC)


CASCADE RANGE VOLCANOES
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. Additionally, GPS data from most of the major volcanoes, and sparse real-time hydrologic and geochemical monitoring, show no anomalous activity.

Recent Observations: Monitoring systems show that activity at Cascade Range volcanoes remains at background levels. Owing to unusually warm, dry weather this year in the Pacific Northwest, Cascade Range volcanoes have already lost nearly all of their seasonal snowpack, which is atypical for late July. Rockfalls on the volcanoes become increasingly common under such late-summer conditions.





Mount St. Helens Seismic Information
CVO Alert Archive Search
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Friday, July 31, 2015 8:48 AM HST (Friday, July 31, 2015 18:48 UTC)


This report on the status of Kilauea volcanic activity was prepared by the USGS Hawaiian Volcano Observatory (HVO). All times are Hawai`i Standard Time.

KILAUEA VOLCANO (VNUM #332010)
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: Inflationary tilt continued at Kīlauea's summit over the past day, and was accompanied by a modest increase in lava lake level. The East Rift Zone lava flow remains active northeast of Puʻu ʻŌʻō, but has not advanced significantly and poses no threat to nearby communities. Low levels of seismic activity continue across the volcano.

Summit Observations: Data from Kīlauea's summit tiltmeters showed that inflationary tilt continued during the past day. The lava lake displayed a corresponding steady rise within the vent as well. Seismicity continues at background levels. Summit sulfur dioxide emission rates ranged from 2,600 to 5,500 metric tons/day for the week ending July 28.

Puʻu ʻŌʻō Observations: There was no obvious change in activity at Puʻu ʻŌʻō, which hosts several incandescent, outgassing crater vents. Low levels of background seismicity continue. The sulfur dioxide emission rate from all East Rift Zone vents was about 500 tonnes/day when measurements were last possible on July 23, 2015.

'June 27th Lava Flow' Observations: Webcam and satellite views show continued activity on the flow field. Active breakouts were scattered across a broad area extending from about 4 to 8 km (2.55 mi) northeast of Puʻu ʻŌʻō. The most distant breakouts are evident by the smoke plumes produced where they are creeping into the forest and burning vegetation along the edge of the flow field.



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

Subscribe to these messages: http://volcanoes.usgs.gov/vns/

Webcam images: http://hvo.wr.usgs.gov/cams/

Phot

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
CALIFORNIA VOLCANO OBSERVATORY MONTHLY UPDATE
U.S. Geological Survey
Monday, July 6, 2015 12:16 PM PDT (Monday, July 6, 2015 19:16 UTC)


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 1, 2015 (0000h PST) through June 30, 2015 (2359h PDT):
Mt Shasta: Four M1 or greater earthquakes were detected. The largest registered M1.86.
Medicine Lake: One M1 or greater earthquake was detected (M1.41).
Lassen Volcanic Center: Eight earthquakes of M1.0 or greater were detected. The largest registered M1.80. Many of these events occurred during two minor swarms on June 22-23, about 12 km north-northeast of the town of Mineral near the Shasta County-Tehama County boarder and on June 26, about 12 km northeast of the town of Mill Creek.
Clear Lake Volcanic Field: One earthquake of M1.0 or greater was detected, of M1.32. [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 M2.73].
Long Valley Volcanic Region: In Long Valley Caldera, 9 earthquakes of M1.0 or greater were detected. The largest event registered M2.31. In the Mono Craters region, no earthquakes of M1.0 or greater were detected, and 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 event registered M3.15].
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 5 earthquakes of M1.0 or greater. The largest registered M3.31.
Coso Volcanic Field: The typical high level of seismicity was observed, with 11 earthquakes M1.0 or greater. The largest registered M3.31.

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 http://volcanoes.usgs.gov/activity/alertsystem/icons.php.

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 http://volcanoes.usgs.gov/observatories/calvo/. For general information on the USGS Volcano Hazard Program http://volcanoes.usgs.gov. Statewide seismic information for California and Nevada can be found at http://earthquake.usgs.gov/earthquakes/recenteqscanv/.







CalVO Alert Archive Search
NORTHERN MARIANA ISLANDS WEEKLY UPDATE
Friday, July 31, 2015 9:30 AM PDT (Friday, July 31, 2015 16:30 UTC)


Report prepared by the U.S. Geological Survey.

PAGAN VOLCANO (VNUM #284170)
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 remain temporarily unavailable.

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: http://hvo.wr.usgs.gov/hazards/FAQ_SO2-Vog-Ash/main.html

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

OTHER NORTHERN MARIANA ISLAND VOLCANOES

Other Northern Mariana Islands volcanoes show no signs of significant unrest in satellite data.
Equipment failure on April 3, 2015 resulted in the loss of seismic data from all but one seismic station on Anatahan.
Loss of data connections due to recent typhoon activity has prevented the USGS from conducting daily checks of earthquake activity at Sarigan, and Anatahan volcanoes. There is no estimate at present as to how long it will take to restore these connections.

For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://volcanoes.usgs.gov/activity/alertsystem/index.php

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

CONTACT INFORMATION:
USGS Northern Mariana Duty Scientist (808) 967-8815
http://volcano.wr.usgs.gov/cnmistatus.php

CNMI Homeland Security and Emergency Management Office (670) 664-2216
http://www.cnmihsem.gov.mp/






NMI Alert Archive Search
YELLOWSTONE VOLCANO OBSERVATORY MONTHLY UPDATE
Wednesday, July 1, 2015 10:48 AM MDT (Wednesday, July 1, 2015 16:48 UTC)


YELLOWSTONE VOLCANO (VNUM #325010)
44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

Seismicity

During June 2015, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 82 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a small earthquake of magnitude 2.6 on June 21, at 04:40 PM MDT, located about 13 miles north northeast of Old Faithful, WY.

June seismicity included an earthquake swarm occurring on June 13 - 14th, about 6 miles southwest from West Thumb, WY, accounting for 16 earthquakes (ranging in magnitude from -0.1 to 2.4). The largest swarm event was a small earthquake of magnitude 2.4 on June 14, at 01:06 AM MDT.

Yellowstone earthquake activity in June remains at low background levels.


Ground deformation

GPS stations in Yellowstone continue to show little or no ground deformation. See for example:

http://www.unavco.org/instrumentation/networks/status/pbo/data/HVWY (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

CONTACT INFORMATION:
Jacob Lowenstern, Scientist-in-Charge
jlwnstrn@usgs.gov






YVO Alert Archive Search