May 21 , 2023.
Italy / Sicily , Etna :
Communique on the activity of Etna, May 21, 2023, 05:51 (03:51 UTC).
The National Institute of Geophysics and Volcanology, Osservatorio Etneo, communicates that due to the cloud cover, which persists in the summit area of the volcano, it is not possible to carry out volcanological observations via the video surveillance network.
From the seismic point of view, there are no significant variations. The ETNAS system has changed to F0 status.
In the hours following the previous press release, the signals from the permanent GNSS and clinometer networks for deformation control did not show any significant variations.
Further updates will be communicated soon.
Source and photo : INGV.
Mexico , Popocatepetl :
May 20, 11:00 a.m. (May 20, 5:00 p.m. GMT)
During the last 24 hours, according to the monitoring systems of the Popocatépetl volcano, 94 exhalations accompanied by water vapor, volcanic gases and ash have been detected. In addition, 674 minutes of high frequency tremor were recorded, accompanied by the emission of incandescent fragments on the flanks of the volcano. In addition, three minor explosions were recorded today at 6:14 a.m., 6:56 a.m. and 9:00 a.m. and a moderate explosion today at 3:18 a.m.
CENACOM (National Center for Communication and Civil Protection Operations) reported this morning a slight fall of ash in Tétela del Volcán, Morelos, in the localities of Venustiano Carranza, Gustavo A. Madero, Azcapotzalco, Tlalpan and Iztapalapa in Mexico City, in the municipalities of Zumpango, Tlalmanalco, Ecatepec, Chicoloapan, Amecameca, Ayapango, Ozumba, Ecatzingo, Atlautla, Chalco, Temamatla, Tenango del Aire, Juchitepec, Cocotitlán, Tepetlixpa, Tonanitla, Tecámac, Jaltenco, Chiconcuac and Acolman in the State of Mexico.
In the early hours of the morning, due to the ash fall, the airports of Mexico City and Felipe Ángeles closed their doors.
At the time of this report, although there is partial visibility towards the volcano due to weather conditions in the area, a constant emission of water vapor, volcanic gases and light amounts of ash has been observed in a North-West (NW) direction.
CENAPRED insistently reiterates the recommendation NOT TO CLIMB to the crater of the volcano, because there is the possibility of explosions, as has been seen on several occasions in the past, involving the emission of incandescent fragments. Therefore, he is required to respect the exclusion radius of 12 km. Also, in heavy rain, stay away from the bottom of ravines due to the danger of mudslides and debris.
The Popocatépetl volcanic alert traffic light is in YELLOW PHASE 2.
Source : Cenapred .
Photos : OsvaCs , Cenapred.
Indonesia , Semeru :
VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA
Issued : May 20 , 2023
Volcano : Semeru (263300)
Current Aviation Colour Code : ORANGE
Previous Aviation Colour Code : orange
Source : Semeru Volcano Observatory
Notice Number : 2023SMR192
Volcano Location : S 08 deg 06 min 29 sec E 112 deg 55 min 12 sec
Area : East java, Indonesia
Summit Elevation : 11763 FT (3676 M)
Volcanic Activity Summary :
Eruption with volcanic ash cloud at 22h45 UTC (05h45 local).
Volcanic Cloud Height :
Best estimate of ash-cloud top is around 13683 FT (4276 M) above sea level or 1920 FT (600 M) above summit. May be higher than what can be observed clearly. Source of height data: ground observer.
Other Volcanic Cloud Information :
Ash cloud moving to north. Volcanic ash is observed to be gray. The intensity of volcanic ash is observed to be thick.
Eruption recorded on seismogram with maximum amplitude 22 mm and maximum duration 108 second.
Source : Magma Indonésie.
Photo : Oystein Lund Andersen
Colombia , Nevado del Ruiz :
Manizales, May 20, 2023 10:05 a.m.
Regarding the monitoring of the activity of the NEVADO DEL RUIZ VOLCANO, the MINISTRY OF MINES AND ENERGY through the COLOMBIAN GEOLOGICAL SERVICE (SGC) informs that:
From 9:00 a.m. yesterday (May 19) until the time of publication of this bulletin, seismic activity associated with the fracturing of rock inside the volcanic edifice has maintained similar levels in the number of earthquakes. and in the seismic energy released, compared to the day before. (May 18). This seismicity was located mainly in the North-North-West sector and, to a lesser extent, in the North-East and South-East sectors of the volcano, as well as in the Arenas crater, at a maximum distance of 8 km from it. this. The earthquakes had low magnitudes and their depths varied between 1 and 6 km.
Regarding the seismicity related to the movement of fluids inside the volcanic conduits, this activity has maintained low levels in the number of earthquakes and in the seismic energy released, although it has shown a slight increase compared to the previous day (May 18). Some of the seismic signals were associated with pulsating ash emissions confirmed by web cameras used for volcanic monitoring.
In addition, variations continue in the degassing of sulfur dioxide and the release of water vapor from the crater into the atmosphere. The maximum height of the gas column was 900 m,
measured from the top of the volcano. The direction of dispersion of the column was mainly towards the southwest of the volcanic structure. Yesterday, it was not possible to observe the existing thermal anomaly at the bottom of the crater, due to the amount of gas and steam emitted by the volcano.
Source et photo : SGC
Democratic Republic of Congo , Nyamulagira :
It is since the evening of this Friday, May 19 that a red glow is observed on the north side of the city of Goma, in North Kivu, where two active volcanoes of the Virunga chain are located.
According to officials from the Volcanological Observatory of Goma (OVG), it is the Nyamulagira volcano that is erupting.
“Yesterday, we released a press release to tell the population that the Nyamulagira is active in its crater and that if it ever erupts, it will move in the park. So it is the Nyamulagira volcano which is erupting inside its crater, ”confirmed Kasereka Mahinda Célestin, scientific director of the OVG.
According to him, there is nothing to fear for the population of the city of Goma, because this volcano is still oriented in the Virunga park and the Nyiragongo volcano which stands as a protective wall against the flow of lava. .
In a recent press release, however, the OVG called on the population of Goma to observe hygiene measures, especially by washing vegetables well.
Source : Mediacongo
Photo :Charles Balagizi