May 18 , 2016. EN. Etna , Klyuchevskoy , Awu , Mount Hood , Maccalube de Aragona.
May 18 , 2016.
Etna , Sicily :
Etna update, 17 May 2016, 20:00 UTC
Since early April 2016, there has been a gradual resumption of summit eruptive activity at Etna, which initially consisted of increased gas emission mainly from the Northeast Crater (NEC) and from the vent that had opened on 25 November 2015 on the upper east flank of the New Southeast Crater (NSEC). This was accompanied by rather discontinuous and small emissions of ash; during the first half of May, these emissions from the NSEC also produced small anomalies visible in the images of the thermal monitoring camera at Monte Cagliato (EMCT). On 7 May, an increase in the volcanic tremor amplitude, whose source shifted toward the NSEC, was accompanied by the appearance of a source of infrasonic signals at the NSEC; however, the poor weather conditions allowed only to observe a modest emission of ash from the NSEC (25 November vent) and from the NEC.
During the night of 16 May, very weak and rare glows were observd at the 25 November vent of the NSEC, again accompanied by infrasound signals originating from the same vent. On the early morning of 17 May, the monitoring network of the INGV-Osservatorio Etneo (INGV-OE) recorded a gradual increase of the volcanic tremor amplitude, accompanied by infrasound signals coming from the NEC, and intense degassing with occasional, weak ash emissions from the same crater. INGV-OE staff present in the area of the Grotta del Gelo (on the upper north-northwestern flank) reported hearing explosion sounds probably coming from the NEC.
Further updates will be posted shortly.
Source : INGV.
Photo : Salvatore Lo Giudice
Klyuchevskoy , Kamchatka :
Elevation 4754 m
The ash plume has spread to the southeast of the volcano.
The explosive eruption of the volcano continues. Ash explosions up to 19.700 to 26.240 feet (6-8 km) a.s.l. could occur at any time. The current activity could affect international low-flying aircraft.
Distance ash plume / volcano cloud: 17 mi (28 km)
Drift direction of the ash plume / cloud from the volcano: Southeast / azimuth 135 degrees
Time and method of determining the ash plume / cloud: 20160516 / 2010Z – 18 NOAA (4M5)
KVERT reported that a Strombolian eruption at Klyuchevskoy continued during 29 April-6 May. Satellite and video data showed a lava flow effusing on the SE flank, down the Apakhonchich drainage. Satellite images showed an intense thermal anomaly over the volcano, and an ash cloud that drifted 88 km SE on 2 May. The Aviation Color Code was raised to Orange.
Source : Kvert , GVP.
Photo : Yu. Demyanchuk, IVS FEB RAS, KVERT
Awu , Indonesia :
Visually, the G. Awu is usually shrouded in fog, with, as is evident, the inability to observe from the observation post of the volcano, solfataras and the emissions of G. Awu.
The results of monitoring of the seismicity of G. Awu during the period of April 2016 shows that the seismicity has fluctuated, with a tendency to increase in the number of earthquakes that began to be clearly observed significantly on May 11, 2016. The number of local earthquakes and deep volcanic tectonic earthquakes recorded their highest number ever recorded in the last one year period. The number of registered shallow volcanic earthquakes is the second highest ever recorded in the last period of one year after the incident of November 24, 2015, when the level of activities had been increased from level I (normal ) to level II (Alert).
The results of calculation of seismic amplitude (RSAM) indicates that the short-term growth model of G. Awu, observed on May 11 has dropped. But the long-term trend shows that seismic activity of the G. Awu has increased . The results of the estimate of the epicenters of G. Awu show that the center of seismic activity is mainly scattered at depths of 500 to 4000m.
The increase of deep volcanic seismic activity and shallow of the G. Awu indicates an increase in the magmatic liquid supply to the surface.
Based on the analysis of visual, instrumental record, and the potential threat of danger, since May 12, 2016 at 12:00 the level of activity of G.Awu was increased from Level II (waspada) to Level III (SIAGA).
Intensive monitoring is ongoing to assess the level of activity and the threat of eruption of the G. Awu. If there is a significant change in volcanic activity, the activity level of Awu can be reviewed and modified depending on the threat level.
The massive Gunung Awu stratovolcano occupies the northern end of Great Sangihe Island, the largest of the Sangihe arc. Deep valleys that form passageways for lahars dissect the flanks of the volcano, which was constructed within a 4.5-km-wide caldera. Powerful explosive eruptions in 1711, 1812, 1856, 1892, and 1966 produced devastating pyroclastic flows and lahars that caused more than 8000 cumulative fatalities. Awu contained a summit crater lake that was 1 km wide and 172 m deep in 1922, but was largely ejected during the 1966 eruption.
Source : VSI , GVP.
Photo : Pvgmbh , A Solihin.
Mont Hood , United States :
Recent Mount Hood earthquake swarm is typical for Oregon volcano.
May 16, 2016
At Mount Hood, a swarm of small earthquakes was detected May 15-16, 2016. Swarms are not uncommon in the Mount Hood area, which typically experiences one or two swarms per year that last for several days to weeks.
The earthquakes in this swarm are located 2-3 miles south of the summit of Mount Hood at depths of 2-3 miles below sea level. The largest event was a magnitude 1.8. Earthquake rates reached as many as 20 earthquakes per hour, peaking between 6-7 am on May 16 before decreasing later in the day. The Pacific Northwest Seismic Network located nearly 40 earthquakes; many more events occurred that were too small to be located.
Map view of earthquakes (circles) near Mount Hood between 1980 and May 16, 2016 from the Pacific Northwest Seismic Network. (Click image to view full size.)
This swarm is very typical for Mount Hood because it is located several miles away from the summit vent – it is rare to see swarms occur directly beneath the summit. The most energetic swarm recorded to-date occurred in June-July of 2002, which included a magnitude 4.5 that was broadly felt in the Government Camp area. The current swarm is much, much smaller than the 2002 swarm, both in terms of earthquake size and in number.
Cumulative number of earthquakes (counts) that have occurred at Mount Hood since the year 2000. (Click image to view full size.)
Studies of past swarms in the Mount Hood area have concluded that they likely are occurring on pre-existing regional faults and are best thought of as regional « tectonic » earthquakes, rather than earthquakes directly linked to magmatic processes. This is in contrast to the recent uptick in seismicity at Mount St. Helens, which we DO believe is caused by magmatic processes (specifically magma recharge).
Source : CVO
Maccalube de Aragona , Sicily :
An article that I have promised to the Corpo Forestale di Aragona, to apologize for the inconvenience.
Integral Nature Reserve of Macalube di Aragona is a regional nature reserve in Sicily, located 4 km southwest of Aragona and 15 km north of Agrigento, which includes a wide argillaceous area characterized by the presence of phenomena eruptive.
Volcanoes are the result of a rare geological phenomenon called sedimentary volcanism.
The phenomenon is related to the presence of substantial small clay soils interspersed with brackish water layers dominant methane gas bubbles subjected to a certain pressure. Gas, through the discontinuities of the soil rises to the surface, carrying with him the clay sediments and water, resulting in a mud cone whose summit is like a volcanic crater. The phenomenon is sometimes with explosive character, with ejection of clayey material mixed with gas and water, projected to a considerable height. In recent years, an intense and sudden explosive activity is marked by the issuance of large volumes of sludge. Researchers have shown a correlation between explosive activity and seismic activity at the local level, requiring further interdisciplinary studies
The State Forestry Corps (Corpo Forestale), often simply called the forest, is an Italian police force. It depends directly on the Ministry of Agricultural Policy, Food and Forestry, organization and separate management of the Department. Its task is the defense of the environment with qualifications of judicial police, and participates together with other police forces to safeguard public order. In addition to this, it manages including 130 national natural reserves.
The Chaudron de Vulcain address a sad thought for Laura and Carmelo and their families .