July 02 , 2017. EN. Yellowstone , Klyuchevskoy , Kilauea , Popocatepetl .

Home / blog georges Vitton / July 02 , 2017. EN. Yellowstone , Klyuchevskoy , Kilauea , Popocatepetl .

July 02 , 2017. EN. Yellowstone , Klyuchevskoy , Kilauea , Popocatepetl .

July 02 , 2017.

 

Yellowstone , United – States  :

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 2017, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 1171 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a light earthquake of magnitude 4.4 on June 16, at 06:48 PM MDT, located about nine miles north northwest of West Yellowstone, MT. The earthquake was reported felt in the towns of Gardiner and West Yellowstone, MT. This earthquake is part of an energetic sequence of earthquakes in the same area that began on June 12.

 

 

June seismicity in Yellowstone was marked by four distinct clusters of episodic earthquakes:
1) An energetic swarm of 1027 earthquakes, ~six miles north of West Yellowstone, MT, began June 12 and is ongoing, including the largest event of the month on June 16 (magnitude 4.4). This swarm also consists of five earthquakes in the magnitude 3 range and 72 earthquakes in the magnitude 2 range.
2) 41 events occurred in a small swarm ~14 miles east northeast of West Yellowstone, MT, with swarm activity occurring June 14 and 15. The largest earthquake of the swarm (magnitude 2.3) occurred June 14, at 07:39 AM MDT ~14 miles east northeast of West Yellowstone, MT. This swarm includes two earthquakes in the magnitude 2 range.
3) A small swarm of 22 earthquakes, ~14 miles south southwest of Mammoth, WY, took place on June 1 and 2 (UTC), with the largest event (magnitude 2.6) occurring June 1, at 08:29 PM MDT. This swarm includes 3 earthquakes in the magnitude 2 range.
4) A small swarm of 13 earthquakes, ~16 miles east northeast of West Yellowstone, MT, occurred June 13. The largest earthquake (magnitude 1.7) occurred June 13, at 07:14 AM MDT ~16 miles east northeast of West Yellowstone, MT.

Earthquake sequences like these are common and account for roughly 50% of the total seismicity in the Yellowstone region.

Yellowstone earthquake activity is currently at elevated levels compared with typical background activity.

 

Ground deformation:
Monitored locations within the Yellowstone caldera continue to slowly subside. Uplift north of the caldera, centered near the Norris Geyser Basin continues at a low rate. Behavior is similar to the past several months. Current deformation patterns at Yellowstone remain within historical norms.

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.

 

Source : YVO.

 

Klyuchevskoy , Kamchatka :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)

Issued: 2017, July 02 .
Current Aviation Color Code: ORANGE
Previous Aviation Color Code: orange
Source: KVERT
Notice Number: 2017-153
Volcano Location: N 56 deg 3 min E 160 deg 38 min
Area: Kamchatka, Russia
Summit Elevation: 15580 ft (4750 m)

 

 

Volcanic Activity Summary:
A moderate eruptive activity of the volcano continues. A gas-steam plume containing some amount of ash is extending for about 160 km to east-south-east from the volcano.
Explosive eruption of the volcano continues. Ash explosions up to 26,200-32,800 ft (8-10 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.

Volcanic cloud height: 16400 ft (5000 m) AMSL
Time and method of ash plume/cloud height determination: 20170702/0230Z – Video data
Other volcanic cloud information: Distance of ash plume/cloud of the volcano: 99 mi (160 km)
Direction of drift of ash plume/cloud of the volcano: E / azimuth 100 deg
Time and method of ash plume/cloud determination: 20170702/0200Z – Himawari-8

 

Source : Kvert

Photo : 14/10/2016 ,  Yu. Demyanchuk, IVS FEB RAS, KVERT

 

Kilauea , Hawai :

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:
No significant change. Kīlauea Volcano continues to erupt at the summit and at Puʻuʻōʻō vent on the East Rift Zone. The episode 61g lava flow from Puʻuʻōʻō is entering the ocean at Kamokuna. Surface flows are active above the pali, but pose no threat to nearby communities. The summit lava lake surface is about 38 m (123 ft) below the floor of Halemaʻumaʻu this morning. There have been no significant changes in seismicity levels or ground deformation trends across the volcano.

 

Initially, the lake was not very active, with just three localized spots of bubbling, then in a minute, the pond’s crusted over surface began fracturing into large slabs that quickly disappeared into the fiery molten depths of Pu‘u ‘O‘o.

Summit Observations:
Tiltmeters at Kīlauea’s recorded a switch to inflation at about 9 pm last night. The lava lake level was measured at 38 m (123 ft) below the rim of the Overlook Vent this morning. Webcam views of the lava lake can be found at: http://hvo.wr.usgs.gov/cams/region_kism.php. Seismicity is within normal, background rates with tremor fluctuations associated with lava lake spattering. Summit sulfur dioxide emission rates remain high.

Puʻuʻōʻō Observations:
Webcam images over the past 24 hours show persistent glow at long-term sources within the crater and from a small lava pond on the west side of the crater. There were no significant changes in seismicity over the past 24 hours. The tiltmeter near Puʻuʻōʻō crater recorded modest fluctuations over the past day. The sulfur dioxide emission rate from the East Rift Zone vents has been steady over the past several months and remains significantly lower than the summit emission rate.

 

Lava Flow Observations:
The episode 61g flow is still active and entering the ocean at Kamokuna. Near Puʻuʻōʻō, flows continue on the upper portion of the flow field. These flows do not pose any threat to nearby communities at this time.

Source : HVO

Photos : Bruce Omori , David Ford .

 

Popocatepetl , Mexico :

Update 01 July 2017, 11:00 (01 July, 16:00 GMT).

Over the past 24 hours, Popocatepetl volcano monitoring systems have identified 67 low-intensity exhalations accompanied primarily by gas and water vapor emissions. In addition, an explosion was recorded yesterday at 10:10 pm, without there being any visibility.

 

During the night, an incandescence was observed above the crater, especially during exhalations.
At the time of this report there is no visibility on the volcano due to the cloud conditions in the area, however, in the early morning hours and for short periods it was possible to observe the continuous emission of volcanic gases to the north-west.

CENAPRED asks not to approach the volcano and in particular the crater.

The volcanic alert semaphore of the volcano Popocatepetl is located in Amarillo Phase 2.

 

Source : Cenapred

Photo : Archive

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