Global & Disaster Medicine

Archive for the ‘Volcano’ Category

Alaska: Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition

Alaska Volcano Observatory:  The Alaska Volcano Observatory (AVO) is a joint program of the United States Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS).

AVO Image

February 19 Bogoslof eruption plume as seen from Unalaska Island, 53 miles ESE of Bogoslof volcano. Photo taken from helicopter during fieldwork by AVO geologists at 5:22PM, approximately 14 minutes after the start of the eruption.

Date: February 19, 2017 5:22 PM
Volcano(es): Bogoslof
Photographer/Creator: Schaefer, Janet
Citation Information:
Image courtesy of the AVO/ADGGS.
53°55’38” N 168°2’4″ W, Summit Elevation 492 ft (150 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGEThere has been no new volcanic emissions observed at Bogoslof volcano since the eruption yesterday, May 28 at 22:16 UTC. No detectable activity has been observed in data from seismic or infrasound stations located on nearby Islands and no new activity has been observed in satellite data. Pilot Reports indicate that a volcanic cloud from yesterday’s eruption has been detected drifting to the northeast of Bogoslof and a SIGMET aviation warning message has been issued by the National Weather Service. Please see the NWS AAWU at for updated information on aviation warning messages.Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Activity may ramp back up with additional explosions producing high-altitude (>15,000 ft) volcanic clouds with little precursory activity. Some previous explosions have been preceded by an increase in earthquake activity that allowed for short-term forecasts of imminent significant explosive activity. Although we are able to detect energetic explosive activity in real-time, there is typically a lag of tens of minutes until we can characterize the magnitude of the event and the altitude of the volcanic cloud. It is possible for low-level unrest, including explosive activity, to occur that we are unable to detect with existing data sources. Such low-level periods of unrest and possible explosions could pose a hazard in the immediate vicinity of the volcano.

AVO Image

5/7/1902: Martinique’s Mount Pele begins the deadliest volcanic eruption of the 20th century.

4/17/1815: Heavy eruptions of the Tambora volcano in Indonesia killed almost 100,000 people directly and indirectly.

History Channel


Mount Etna injures 10

Lava Flows from the Past

March 8, 1669: Mount Etna in Sicily begins rumbling and multiple eruptions over the next few weeks will kill more than 20,000 people and left thousands more homeless.

History Channel

Recent eruption on Mount Etna

Mount Etna roared to life this week on the island of Sicily, sending red-hot fountains of molten rock and ash high into the air and down the slopes of Europe’s largest and most active volcano.


Kilauea: Its terror and its beauty

The Popocatépetl volcano erupted with a billowing cloud of dark ash billowing into the morning sky Friday and ever since there have been 129 exaltations of ash, three explosions and one measurable earthquake.




11/13-14/1985, The Nevado del Ruiz volcano erupts in Colombia, killing over 20,000 people as nearby towns are buried in mud, ice and lava.

History Channel



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