May 19 , 2016. EN . Etna , Kilauea , Telica , Momotombo , Masaya , San Cristobal , Sabancaya.
May 19, 2016.
Etna , Sicily :
Since the evening of 17 May 2016, there has been an intense Strombolian activity at Etna’s Northeast Crater (NEC), with ejection of incandescent bombs above the crater rim and fall of pyroclastics over the flanks of the cone. This morning, 18 May, this activity was also accmpanied by emission of volcanic ash forming a plume that was blown eastward by the wind and rapidly dispersed in the atmosphere .
There were also weak glows at the 25 November 2015 vent on the upper east flank of the New Southeast Crater (NSEC). The volcanic tremor amplitude remained elevated at values similar to those reached on the evening before. On the late forenoon, a clinometer installed at Punta Lucia, at nearly 3000 m elevation and about 1 km northwest of the NEC, recorded rapid inflation (swelling) of the summit area.
Shortly after 12:50 local time on 18 May 2016, the visual and thermal surveillance cameras of the INGV-OE recorded the onset of eruptive activity at the Voragine (VOR), which in just a few minutes evolved into a pulsating lava fountain. At the same time, the Strombolian activity at the NEC diminished and passed into emission of dark ash, and finally ended. The image at left is a frame captured by the thermal monitoring camera at Bronte (EBT), about 45 minutes after the onset of the activity at the VOR. With the beginning of paroxysmal activity, the volcanic tremor amplitude showed a rapid increase, and its source migrated from a position below the NEC toward the VOR. From the Voragine an ash plume rose to 3000-3500 m above the summit and was blown by the wind to east-southeast. During the afternoon lava started to overflow from the western rim of the Voragine-Bocca Nuova depression, feeding a minor lava flow toward west, and limited to the summit area.
At the time this update is being published, lava fountaining is continuing at the VOR. The eruptive activity is monitored continuously by the systems of video and thermal cameras, seismic stations and ground deformation.
This morning, the tremor is still very high, and the seismic recordings in real time show that the activity taken over after a break last night. The weather was overcast on Mount Etna, so you might not see anything, unfortunately.
Pictures of that night on social networks show a large lava flow down to the Valle del Bove …
As soon as the INGV will publish an update, you will be informed. (Ed)
Video: Turi Caggegi
Photos: Dario Lo Scavo, Gra.M Francesco Butano
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
Eruptive activity continues at Kilauea Volcano’s summit and East Rift Zone. Seismicity and deformation rates throughout the volcano were steady during the past day. The lava lake at the summit is high enough for spattering to be seen from Jaggar Museum overlook. Scattered lava flow activity continued on the June 27th lava flow field within about 5.8 km (3.6 mi) northeast of Pu’u ‘O’o. These flows currently pose no threat to nearby communities.
The small lava pond in the western portion of Puʻu ʻŌʻō Crater was at a higher level today compared to previous visits, and closer to the pit rim. A disruption in the pond created increased spattering and agitation during our observation period. For scale, the pond is about 25 meters (80 ft) in diameter.
The lava lake within the Halema’uma’u Overlook crater remained active, with the lava level measured at 24 m (79 ft) below the Halema’uma’u crater floor yesterday afternoon–high enough for spattering to be seen from the Jaggar Museum overlook. Summit tiltmeters measured slow inflation during the past day. Tremor fluctuations associated with lava lake spattering continued. Sulfur dioxide emissions from the summit vent ranged from 2,000 to 7,000 t/d during the two weeks. Data from GPS networks and interferometric satellite radar (InSAR) show continued long-term inflation of the summit and upper Southwest Rift Zone magma reservoirs.
Pu’u ‘O’o Observations:
Webcam images show persistent glow from spatter cones within the crater and from skylights in the lava tube on the northeast flank of the cone. The tiltmeter on the cone has been recording inflationary tilt during the past five days. Seismic activity remains low at Pu’u ‘O’o. The sulfur dioxide emission rate from all East Rift Zone vents was about 300 metric tons/day when last measured on May 02.
June 27th Lava Flow Observations:
Webcam images show continued surface flow activity on the June 27th flow field in the form of small breakouts scattered northeast of Pu’u ‘O’o where they have been occurring for the past several months. Mapping from last week’s overflight indicates that the most distant breakouts were about 5.8 km (3.6 mi) northeast of Pu’u ‘O’o. The flows are not currently threatening any nearby communities.
Source : HVO
Telica , Momotombo , Masaya , San Cristobal , Nicaragua :
Telica Volcano :
The Telica volcano continues to show high microseismicity and low emissions of volcanic gases. Today (16/05) at 8:37, was registered an earthquake between Telica and Cerro Negro, with a magnitude of M 1.6 degrees.
Seismic amplitude in real time is to moderate values, close to 80 units.
Momotombo Volcano : (Above on 16 April)
Saturday and Sunday, the Momotombo volcano presented periods of microseismicity a little high. At this point, it remains at a low level with low emission of volcanic gases.
Seismic amplitude in real time (RSAM) is at low values, less than 70 units.
Masaya Volcano :
At 11:17 p.m. yesterday and 3:21 am today (16/05) two earthquakes of magnitude M2,1 and M1,0 degrees were recorded.
The first occurred in the caldera of the Masaya Volcano and the second to the northwest of the caldera.
These earthquakes have characteristics which were induced by magma movement beneath the caldera of Masaya.
A volcanic tremor of low value is recorded and the seismic amplitude in real time remains around 300 units.
The lava lake continues its strong circulation, and volcanic gas emission is moderate.
San Cristobal Volcano :
At 11:48 p.m. on Saturday, an earthquake under the San Cristobal volcano, which by its small size could not be located, has been registered. This earthquake is related to magma movements occurring under the volcano.
The volcanic gas emission is low and seismic amplitude in real time is to low values, below 40 units.
Source : Ineter
Photo : Martin Rietze .
Sabancaya , Peru :
Generally Sabancaya volcano activity is low. Registration of volcanic seismic events shows averages associated with LP type events (15 LP / day) and Tremor (19 TRE / day). The volcano-tectonic events have shown increased activity on seismic focus located 9 km southeast of the town of Maca. However, the earthquakes VT type proximal were recorded sparingly on Sabancaya.
VTPS type of events (proximal Volcano–tectonic), located less than 6 km from the crater, fell on average, recording 2 VTPS / day. Two events of magnitude 2.6 ML and 2.7 ML recorded between 10 and 14 May, respectively come off.
Magmatic gases expelled by Sabancaya were few, while the water vapor transmission remains constant and predominant. The height during this period has not changed from the previous report, ranging from 400 meters to 800 meters above the crater.
Satellite monitoring of the density of SO2 and thermal anomalies Mirova did not detect significant anomalies in this period
Source : IGEPN