February 13 , 2017. EN. Piton de la Fournaise , Tungurahua , Reventador , Fuego , California Volcanoes .
February 13 , 2017.
Piton de la Fournaise , La Réunion :
The eruption begun on January 31, 2017 at 7:40 pm local time continues. The volcanic tremor (indicator of surface eruptive intensity) remains at a high intensity level (Figure 1).
Figure 1: Evolution of the RSAM (volcanic tremor and eruption intensity indicator) between January 31st and February 12th (5pm local time) on the seismic station of Château Fort, located on the southern flank of the volcano. (© OVPF / IPGP)
– No seismicity was recorded during the day under the summit of Piton de la Fournaise.
– The inflation of the volcano observed for several days seems to have stopped. This parameter will be confirmed in the next few days.
Outlet temperatures at the vent are between 1200 and 1250 ° C.
Source : OVPF
Photo : Timaoul
Tungurahua , Ecuador :
12 February, 2017, SUMMARY OF VOLCANIC ACTIVITY
The activity of the volcano is weak. There was no observed surface activity at the crater. There were no rains or lahars.
TECHNICAL AND OBSERVATIONS ANNEX:
Seismicity: From 11h00 (TL) yesterday until 11h00 (TL) today, 1 event of long period (LP) was recorded.
Observations of emissions and ash: In the morning of today the area of the volcano was clear, no emission was observed at the surface. The top of the volcano is covered.
Rains and lahars: No rainfall was recorded in the area of the volcano.
If the rains are more intense in the area of the volcano, they can remobilize deposits of pyroclastic flows and generate lahars. For this reason, we recommend extreme caution when driving on roads and highways that cross the gorges where these flows have descended and regions that in the past have been affected by this kind of phenomenon.
Source : IGEPN
Photo : José Luis Espinosa Naranjo.( 2012)
Reventador , Ecuador :
Activity Bulletin of Sunday 12 February 2017
SUMMARY OF VOLCANIC ACTIVITY
The volcano maintains its high activity. There were continuous low-ash emissions, rising no more than 1km above the crater. Currently, the volcano is covered. There were no rains or lahars.
TECHNICAL AND OBSERVATIONS APPENDIX
Seismicity: From 11h00 (TL) yesterday until 11h00 (TL) today, 6 episodes of tremor harmonic (TRA), 4 episodes of tremor emission (TRE), 28 events long period LP and 28 explosions EXP) were recorded.
Emission and ash observations: In the morning, a continuous emission of gas could be seen with a low charge of ash at a height of 1000 meters above the crater, dispersing towards the northeast. Currently, the volcano is covered.
Rains and lahars: There were no rains or lahars.
Source : IGEPN
Photo : Hosteria
Fuego , Guatemala :
Activity type: Vulcanian
Morphology: Stratovolcan composite
Geographical location: 14 ° 28’54˝ Latitude N; 90 ° 52’54˝ longitude W.
Weather conditions: Clear
Wind: South-East at 6 Kilometers
Precipitation: 0.0 mm.
Presence of a degassing activity of white fumaroles which rise to a height of approximately 4,200 meters (13,780 feet) with a dispersion towards the West and the Southwest. There were 17 low-level explosions emitting ash columns from 4,200 to 4,500 meters (13,780 to 14,765 feet), which spread over a distance of 6-7 km to the west and south-west, pulses incandescent at 100-150 m above the crater which generated weak avalanches on the crater’s outline. The result of these explosions was an increase in the fall of fine particles of ash on the villages of Morelia, and Panimache I and II.
Source : Insivumeh
Photo : Ivan Castro
California Volcanoes , United- States :
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 January 1, 2017 (0000h PST) through January 31, 2017 (2359h PDT):
Mt Shasta: No earthquakes at or above M1.0 were detected.
Medicine Lake: No earthquakes at or above M1.0 were detected.
Lassen Volcanic Center: Eight earthquakes at or above M1.0 were detected. The largest event registered M2.12.
Clear Lake Volcanic Field: Five earthquakes at or above M1.0 were detected, with the largest registering M2.26. [Note: The typical high level of seismicity was observed under the Geysers steam field located at the western margin of CLVF. The largest event was M3.89].
Long Valley Volcanic Region: In Long Valley Caldera, 46 earthquakes of M1.0 or greater were detected, with the largest event registering M2.12. Four earthquakes at or above M1.0 were detected in the Mono Craters region, with the largest registering M2.08. No earthquakes at or above M1.0 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 event registered M3.44].
Ubehebe Craters: No earthquakes at or above M1.0 were detected.
Salton Buttes: Six earthquakes of M1.0 or greater were detected, with the largest registering M1.96
Coso Volcanic Field: The typical high level of seismicity was observed, with 28 earthquakes M1.0 or greater. The largest registered M2.67.
The U.S. Geological Survey will continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted.
Source : Calvo
Photo : Ubehebe Craters, Archives