On January 23, 2017, after an energetic earthquake swarm was detected on Tanaga Island, the Alaska Volcano Observatory raised the aviation color code to YELLOW and the alert level to Advisory. As of January 26, earthquakes continue to be located within 6 to 7 km of Takawangha volcano. No activity has been detected at the volcano in satellite data.
Volcano(es): Takawangha Tanaga
Photographer: Schaefer, Janet
URL: avo.alaska.edu/image/view/104031
Takawangha 2017/1
On January 24, 2017, citing an energetic earthquake swarm, AVO raised the Aviation Color Code and Volcano Alert Level at Takawangha from UNASSIGNED to YELLOW/ADVISORY. The earthquake swarm began January 23. The earthquakes located 6-7 km ESE of Takawangha Voclano. This activity could have been due to brittle failure in the surrounding rock caused by magma movement. No eruptive activity was detected in satellite imagery or other data.
Following a significant decline in the energetic earthquake swarm, with seismicity returning to near background levels, AVO lowered the Aviation Color Code to GREEN and Alert Level to NORMAL for Takawangha volcano on February 8, 2017.
Please cite the photographer and the Alaska Volcano Observatory / Alaska Division of Geological & Geophysical Surveys when using this image.
Full Resolution.