July 14, 2015. English. Colima , Nevado Del Ruiz, Raung.
July 14, 2015.
Colima , Mexique :
Update on the actions the State Civil Protection Unit performs following the activity on the Colima Volcano.
Operational command supervisory, the Director General Trinidad Lopez, gave an overview with the authorities of Jalisco and Colima to observe, monitor and analyze the evolution of the Colossus and his condition after the events that took place yesterday and today ‘hui.
The volcano continues this constant phase of moderate eruption of incandescent matter, ash, pyroclastic flows, incandescent and landslides avalanches on its slopes, which reached a maximum of 2.8 km from the crater. It also pursues a moderate to high seismicity.
The emission of ash was significant, reaching 4 km above the crater and even falling in the municipalities of Comala, Colima and Villa de Alvarez, where ash fall remains constant. The eruption continued, it should be noted that the Colima airport has been closed since Saturday.
An exclusion zone of 5 km has been declared, but was extended to 12 km because of an activity increasingly strong. Have already been preventively evacuated about 500 residents of this region and an emergency zone was declared near the areas adjacent to the 12 km exclusion zone.
The community of La Yerbabuena and La Becerrera have found temporary shelter in Vasco de Quiroga school, Comala, municipal seat, the agency reported through a press. «
On the ground, the volcano seems to have changed style, less than avalanches of rocks and pyroclastic flows, but more intermittent explosions.
However, the activity of the pyroclastic flows rose rapidly Saturday, July 11, with powerful pyroclastic flows that came down about 10 km, mainly in the ravines of La Lumbre and Montegrande on SW and S. sides On the south side, they were almost continuous, although the base of the volcano is visible. During the evening and night, this activity has decreased. Judging by the diffuse glow visible through the cloud cover, it seems that a flow of coherent lava was active on the higher side South. Today, no pyroclastic flow was seen (most of the time, the volcano was in the clouds), but several moderate sized ash plumes amounted from the summit, probably caused by explosions.
Source : mexico.cnn.com, T Pfeiffer ( volcanodiscovery ).
Photo : Angel Guardian. Protection civile Jalisco.
Nevado del Ruiz, Colombie :
In the last hours it was recorded on the volcano a seismic tremor signal type, associated with ash emissions. Dated as of July 13, at 9:08, was recorded a new pulse of volcanic tremor, and it was possible to associate this event with an ash emission from the volcano through web cameras located on its slopes.
The approximate height of the ash column was about 1900m above the crater. Following the current wind conditions in the region, it is possible that the ash falls take place in the cities of Chinchina, Villamaria, Manizales and Pereira. It is not excluded to see the falls of ash in other communities, if the wind regime has to change.
During the pulse of tremor at 9:08, it was possible to record an emission of ash that lasted 10 minutes. The signal decreased at the end of the emission, but the tremor remained, displaying an energy of low amplitude.
In addition, the recording of seismic activity associated with the fracturing of the rock in the volcanic structure continued. Earthquakes are located mainly in the northeast and southwest of the volcano, and to a lesser extent in the crater at depths ranging between 1.2 and 6.3 km. The maximum magnitude recorded during the week was 1.9 ML (local magnitude), corresponding to a seismic event in the southwest of Arenas crater, 6 July at 20:21 (local time) at a depth of 5, 43 km.
Source : SGC.
Raung, Indonésie :
After several weeks of tectonic rumblings beneath the surface, one of the most active volcanoes in Indonesia began spewing ash plumes and lava into the skies over tropical Asia. At least 900 airplane flights into and out of Bali and other regional airports were cancelled due to concerns about the ash clouds, which wafted as high as 6 kilometers (20,000 feet) into the air. Volcanic ash can cause extensive damage and failures in jet engines.
On July 12, 2015, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured a natural-color view (top) of a plume of ash and volcanic gases trailing away from Mount Raung on the Indonesian island of Java. The image has a resolution of roughly 250 meters per pixel.
One day earlier, the Operational Land Imager (OLI) on Landsat 8 got a closer view (about 25 meters per pixel) of Raung’s summit caldera amidst some afternoon cloud cover and a plume streaming east and southeast.
Mount Raung is a stratovolcano that has erupted at least 13 times in the past 25 years, according to records kept by the Smithsonian Global Volcanism program. The summit stands 3,332 meters (10,932 feet) above sea level and is capped by steep caldera that is 3 kilometers (2 miles) in diameter. All of the known volcanic eruptions at Raung have occurred within that caldera.
No evacuations were ordered for residents living near Raung, though authorities have urged people to wear face masks so as to not inhale ash.
Source : earthobservatory.nasa.gov
Photo : Nasa , liputan6