Current Alerts for U.S. Volcanoes

  • 2014-10-20 19:45:36 Kilauea Warning Orange
  • 2014-10-20 12:33:34 Shishaldin Watch Orange
  • 2014-10-20 12:33:34 Cleveland Advisory Yellow
  • 2014-10-17 07:16:22 Pagan Advisory Yellow
  • 2014-10-17 09:57:35 Cascade Range Normal Green
  • 2014-10-15 13:59:44 Haleakala Normal Green
  • 2014-10-15 14:02:49 Hualalai Normal Green
  • 2014-10-17 13:42:52 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 20, 2014 12:33 PM PDT (Monday, October 20, 2014 19:33 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

Elevated surface temperatures were detected in satellite images from today. Elevated seismic activity, including small explosions, continues to be observed in local seismic data.

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 detected in partly cloudy satellite images from today. 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

Jessica Larsen, Acting 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 17, 2014 9:57 AM PDT (Friday, October 17, 2014 16:57 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: Monitoring systems show that activity at Cascade Range volcanoes during the past week remains at background levels. Field crews were out maintaining and upgrading installations in and around Newberry, Crater Lake, and Mount Hood.

Mount St. Helens Seismic Information
CVO Alert Archive Search
HVO/USGS Volcanic Activity Notice

Volcano: Kilauea (VNUM #332010)

Current Volcano Alert Level: WARNING

Current Aviation Color Code: ORANGE

Issued: Monday, October 20, 2014, 7:45 PM HST (20141021/0545Z)
Source: Hawaiian Volcano Observatory
Notice Number: 2014/H19
Location: N 19 deg 25 min W 155 deg 17 min
Elevation: 4091 ft (1247 m)
Area: HI Hawaii and Pacific Ocean

Volcanic Activity Summary: The June 27th flow remains active. The flow front has not advanced downslope since October 17, but there are several breakouts within about 1.3 km (0.8 mi) upslope of the front. Along the south side of the flow, a narrow breakout has moved about 80 m/day in the past week, and could overtake the distal tip of the flow in the next couple of days. The flow front remains about 1.4 km (0.9 mi) upslope from Apa`a St. along the steepest descent path and 1.1 km (0.7 mi) upslope from Apa`a St. along a straight line. Lava discharge from Puu Ōō into the June 27th lava tube remains low. Because the flow has not advanced in the past few days, we do not offer a future projection of the flow's advance.

Pāhoa town is in the Puna District of the County of Hawai`i.

Recent Observations:
[Lava flow] The June 27th lava flow has not advanced since October 17. The leading edge remains about 1.1 km (0.7 mi) straight-line distance from Apa`a St.

Hazard Analysis:
[Lava flow] The June 27th lava flow from the Puu Ōō vent is active, with several breakouts within 1.3 km (0.8 mi) upslope of the stalled flow front.

Remarks: The Puu Ōō vent in the East Rift Zone of Kīlauea Volcano began erupting on January 3, 1983, and has continued erupting for more than 31 years, with the majority of lava flows advancing to the south. Over the past two years, lava flows have issued from the vent toward the northeast. The June 27th flow is the most recent of these flows and the first to threaten a residential area since 2010-2011. On June 27, 2014, new vents opened on the northeast flank of the Puu Ōō cone and fed a narrow lava flow to the east-northeast. On August 18, the flow entered a ground crack, traveled underground for several days, then resurfaced to form a small lava pad. This sequence was repeated three more times over the following days with lava entering and filling other cracks before reappearing at the surface, in two of the cases farther downslope. Lava emerged from the last crack on September 6, forming a surface flow that initially moved to the north, then to the northeast, at a rate of 400 m/day (437 yd). The flow slowed thereafter and, between September 12 and 19, the rate of advancement varied, averaging 225 m/day (246 yd). The flow front stalled by September 22, but new breakouts upslope overtook the stalled front on September 29. During the past 2 weeks, advance rates of the flow front have slowed from 120 m/day (131 yd) to less than 25 m/day (27 yd).

Contacts: HVO media contact

Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While this VAN is in effect, regularly scheduled updates are posted at

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 17, 2014 7:16 AM PDT (Friday, October 17, 2014 14:16 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. Cloudy weather obscured the volcano in 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