| (1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
| (2) Issued: | 20140131/0014Z |
| (3) Volcano: | Plosky Tolbachik (CAVW #1000-24-) |
| (4) Current Aviation Color Code: | GREEN |
| (5) Previous Aviation Color Code: | yellow |
| (6) Source: | KVERT |
| (7) Notice Number: | 2014-05 |
| (8) Volcano Location: | N 55 deg 49 min E 160 deg 23 min |
| (9) Area: | Kamchatka, Russia |
| (10) Summit Elevation: | 10118.8 ft (3085 m) |
| (11) Volcanic Activity Summary: | Weak seismic activity of the area of Plosky Tolbachik volcano and Tolbachinsky Dol continues to registering. Volcanic tremor was not recording only from September 25 till November 19, 2013; but episodes of tremor are noting till the present time. Video data showed no incandescences at the northern area of Tolbachinsky Dol last months. Gas-steam activity of cones of Tolbachik Fissure Eruption by 50-years of IVS FED RAS (so-called S. Naboko cones) is observing sometimes. Satellite data continues to show a weak thermal anomaly over the northern area of Tolbachinsky Dol because lava flows keep heat long time. Aerosol and gas-steam plumes at the northern area of Tolbachinsky Dol could affect low-flying aircraft. KVERT will continues to monitor Tolbachik volcano. |
| (12) Volcanic cloud height: | NO ASH CLOUD PRODUCED |
| (13) Other volcanic cloud information: | NO ASH CLOUD PRODUCED |
| (14) Remarks: | Tolbachik Fissure Eruption by 50-years of IVS FED RAS began on November 27, 2012, and probably its active phase was finishing in September 2013. |
| (15) Contacts: | Dr. Olga A. Girina, Head of KVERT, IVS FEB RAS girina@kscnet.ru +74152302549 Duty scientist: +79622825253 |
| (16) Next Notice: | A new VONA will be issued if conditions change significantly or the Aviation Color Code is changes. VONAs are posted at http://www.kscnet.ru/ivs/kvert/index_eng.php. In Russia, KVERT, on behalf of the Institute of Volcanology and Seismology (IVS) FED RAS, is responsible for providing information on volcanic activity to international air navigation services for the airspace users. |
CITATION GUIDELINES For formal scientific citation of this VONA/KVERT Information Release, please use the following: VONA/KVERT Information Release, January 31, 2014. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://www.kscnet.ru/ivs/kvert/van/?n=2014-05. |
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| Aviation Color Codes |
GREEN Volcano is in normal, non-eruptive state or, after a change from a higher level: Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state. |
YELLOW Volcano is experiencing signs of elevated unrest above known background levels. or, after a change from higher level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase. |
ORANGE Volcano is exhibiting heightened unrest with increased likelihood of eruption. or,
Volcanic eruption is underway with no or minor ash emission. |
RED Eruption is forecast to be imminent with significant emission of ash into the atmosphere likely. or,
Eruption is underway with significant emission of ash into the atmosphere. |