May 01 ,2017. EN . Kick ’em Jenny , Poas , Sheveluch , San Miguel ( Chaparrastique) .
May 01 ,2017.
Kick ’em Jenny , The Grenadines .
Warnings issued as volcano near Grenada becomes restless .
30 APRIL 2017. The National Disaster Management Agency is monitoring an increase in activities taking place at Kick ’em Jenny, the region’s only submarine volcano located between Grenada and the Grenadine island of Carriacou.
In a release early Sunday, the disaster agency said it has been advised of the increase in activity by the Seismic Research Centre (SRC) of the University of the West Indies (UWI).
“The UWI/SRC recorded a high amplitude signal, lasting about 25 seconds, on one of the Grenada stations. The signal was also recorded on a station in Montserrat. This signal follows an increase in the number of background events associated with the Kick-’em-Jenny volcano,” said the release which confirmed that persons in the St Patrick’s area have reported feeling tremors.”
As a result, the alert level is now on yellow and sea users and ships have been warned to stay away from vicinity of the submarine volcano. “In light of the ongoing we are advising all sea users that the 5km (3.1 miles) exclusion zone of Kick ’em Jenny be strictly observed. The SRC has advised that heightened alert is necessary for the exclusion zone,” the release added.
A yellow alert means the volcano is restless; seismicity and/or fumarolic activity are above the historical level or other unusual activity has been observed or can be expected without warning.
Kick ’em Jenny, a historically active submarine volcano 8 km off the north shore of Grenada, rises 1300 m from the sea floor. Recent bathymetric surveys have shown evidence for a major arcuate collapse structure that was the source of a submarine debris avalanche that traveled more than 15 km to the west. Bathymetry also revealed another submarine cone to the SE, Kick ’em Jack, and submarine lava domes to its south. These and subaerial tuff rings and lava flows at Ile de Caille and other nearby islands may represent a single large volcanic complex. Numerous historical eruptions, mostly documented by acoustic signals, have occurred at Kick ’em Jenny since 1939, when an eruption cloud rose 275 m above the sea surface. Prior to the 1939 eruption, which was witnessed by a large number of people in northern Grenada, there had been no written mention of Kick ’em Jenny. Eruptions have involved both explosive activity and the quiet extrusion of lava flows and lava domes in the summit crater; deep rumbling noises have sometimes been heard onshore. Historical eruptions have modified the morphology of the summit crater.
Source : ST LUCIA NEWS ONLINE , GVP.
Poas , Costa Rica :
Poas Volcano Activity Report, April 30, 2017, Updated at 11:00 am.
Volcanic activity in the last 24 hours
During the last 24 hours, events of type LPs and VTs were observed, as well as a tremor of low amplitude. In the active crater of Poas, the formation of a cone due to the ejection of fragments of lava at low altitudes, ashes and lake sediments continues.
According to the models of dispersion maps developed by the AERMOD, Atmospheric Chemistry Laboratory (LAQAT-UNA), volcano emissions are assigned to areas such as Cabuyal, Naranjo, San Ramon, Esquipulas, Palmares, Cirri, Grecia, Poas Volcano National Park, Zarcero, Bajos del Toro, Laguna, Picado, Alto Palomo, Altura, Finca Inés, among other places nearby.
During the day, the Poas plume is scattered mainly west and southwest. Over the last 24 hours, there has been reported an odor of sulfur in San Roque de Grecia, San Juanillo de Naranjo and Santa Rosa de Poas.
Source : Ovsicori
Sheveluch , Kamchatka :
VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
Current Aviation Color Code: ORANGE
Previous Aviation Color Code: orange
Volcano Location: N 56 deg 38 min E 161 deg 18 min
Area: Kamchatka, Russia
Summit Elevation: 10768.24 ft (3283 m),
the dome elevation ~8200 ft (2500 m)
Volcanic Activity Summary:
Explosions sent ash up to 10 km a.s.l. at 1420 UTC on 30 April. Ash plume continues to drift to the south-southeast from the volcano, and the leading edge of ash plume was in 310 km from the volcano on the height about 4.5-5 km a.s.l. at 2050 UTC on 30 April.
Explosive-extrusive 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: 14760-16400 ft (4500-5000 m) AMSL
Time and method of ash plume/cloud height determination: 20170430/2050Z – Himawary-8
Other volcanic cloud information:
Distance of ash plume/cloud of the volcano: 193 mi (310 km)
Direction of drift of ash plume/cloud of the volcano: S / azimuth 172 deg
Source : Kvert
Photo : Yu. Demyanchuk, IVS FEB RAS, KVERT
San Miguel , ( Chaparrastique) , El Salvador :
Changes on the Chaparrastic volcano, with high gas emissions.
Date and time of publication: 28/04/2017 14:00:00
Yesterday afternoon, images of the Web camera installed on the Cerro Pacayal recorded a gas pulse up to 1200 meters above the crater, it should be mentioned that during the previous hours, the RSAM values had increased considerably. This type of activity has been recorded on the volcano in recent years and in many cases (like this one), it ends with the emission of gas and / or ash.
During the last 24 hours, the Chaparrastic Volcano continues to show variations in the recording of its internal seismic vibration, which oscillated between 106 and 176 units on average / hour (the standard value considered is 50 units [see figure 1]).
Figure 1. Seismic vibration continues to fluctuate.
These changes in the internal seismic vibration values of the volcano occur through the continuous injection of magmatic fluids (water vapor, volcanic gas and magma [see Figure 2]). This process often ends with the emission of gas and / or ash, as happened yesterday afternoon, when a gas pulse at 1200 meters above the crater was recorded. This type of activity has been recorded on the volcano in recent years.
Figure 2. Evolution of gas emissions and seismic vibrations.
During April, sulfur dioxide (SO2) emissions fluctuated between 76 and 809 tonnes per day (Figure 2). In addition, emissions of steam and other volcanic gases are considered to be important and characteristic of an active open volcanic conduit system with continuous injections of magmatic fluids.
The low values shown in Figure 3 follow the wind that directs the gases to the other sides of the volcano, not to the areas where the tracking equipment is installed.
Figure 3. Gas emission values continue to fluctuate.
The images captured by the surveillance camera located on the Pacayal volcano, shows the continuous emission of gas, which had in the morning a direction towards the North-Northeast. However, after 15h32, the strong gas pulse reached a height of about 1200 meters above the crater (Figure 4a) and was recorded. After this strong impulse, gas emissions continued on the volcano (Figure 4b). At the time of publication of this report, the volcano remains covered with many meteorological clouds. The network of local observers reported no material fall from the crater.
Given the behavior of the volcano recorded in recent days, the exit of gas and / or magma from the central crater or on the flanks of the volcano is not excluded.
The Ministry of the Environment and Natural Resources (MARN) is continuing its enhanced surveillance system and maintains close communication with the Directorate General of Civil Protection and local observers.
The MARN calls the population to stay away from the summit of the Chaparrastic volcano because of the degree of danger that this represents.
The following update data will be published on Wednesday, May 3, 2017. If significant changes occur, a special report will be issued.
Source : Marn El Salvador.
Photo : LPG multimedia