November 30 , 2025.
Italy , Stromboli :
November 29, 2025, 8:24 PM (7:24 PM UTC). Statement on Stromboli activity.
The National Institute of Geophysics and Volcanology, Etna Observatory, reports that images from monitoring cameras show that the lava flow from the North Crater area, as indicated in last night’s statement, has ceased; the flow along the upper part of the Sciara del Fuoco is cooling. Ordinary explosive activity of varying intensity persists, along with lava ejections in the North Crater area, with lava fragments falling around the vents and occasionally into the upper part of the Sciara del Fuoco.
From a seismic perspective, the average amplitude of volcanic tremors remained at moderate levels. No significant changes were reported in the frequency or amplitude of explosion earthquakes, which remain very weak.
Ground deformation monitoring network data showed no significant changes over the past 24 hours.
Further updates will be provided shortly.
Source : INGV.
Photo : Stromboli stati d’animo / Sebastiano Cannavo
Colombie , Puracé – Los Coconucos volcanic chain :
Popayán, November 29, 2025, 8:30 a.m.
Regarding the monitoring of activity in the Los Coconucos volcanic chain, the Colombian Geological Survey (SGC), an agency under the Ministry of Mines and Energy, reports the following:
The alert level for the Puracé Volcano – Los Coconucos Volcanic Chain has been raised to ORANGE: volcano exhibiting significant variations in monitored parameters.
Since this morning, the volcanic monitoring network has recorded a notable increase in activity at the Puracé volcano, which is part of the Los Coconucos volcanic chain. This increase is characterized by:
● An increase in the frequency and energy of earthquakes related to fluid dynamics within the volcano. These earthquakes are associated with the emission of gas and ash into the atmosphere from the Purace crater, with several plumes remaining above 1,000 m and dispersing to the northwest of the volcanic edifice. This seismicity remains localized at a shallow depth beneath the Purace crater, indicating instability in the dynamics of this volcanic system.
The changes recorded represent a significant modification in the volcano’s behavior, justifying the orange alert level set by the Colombian Geological Survey (SGC). While the orange alert level remains in effect, temporary fluctuations in volcanic activity are possible. This means that activity may sometimes decrease compared to previous days or weeks, without necessarily indicating a return to a stable level. Moving to the yellow alert level requires a reasonable timeframe to assess all monitored parameters and identify trends that could indicate reliable stability.
The public is advised to stay away from the crater area, as the current level of activity in the volcanic chain presents a significant risk of exposure to sudden emissions of gas or ash. The Colombian Geological Survey (SGC) recommends closely monitoring the situation through special bulletins and other information published on its official channels, as well as following the instructions of local and departmental authorities and the National Unit for Disaster Risk Management (UNGRD).
The alert level for volcanic activity is now orange: volcano showing significant changes in monitored parameters.
Source et photo : SGC.
Indonesia , Semeru :
Reduced activity at Mount Semeru volcano, East Java, on November 29, 2025.
On Wednesday, November 19, 2025, at 2:13 PM (Western Indonesian Time), an eruption occurred at Mount Semeru in East Java. This eruption consisted of a pyroclastic flow extending 13.8 km in the direction of Besuk Kobokan. The pyroclastic flow was recorded by the Mount Semeru seismograph with a maximum amplitude of 47 mm and a duration of 14,283 seconds (+4 hours).
An integrated analysis of monitoring data indicates that Mount Semeru’s activity after November 19, 2025, remains dominated by surface processes, with no signs of increased magma input from deeper sources. Visually, repeated eruptions of small to medium magnitude were observed, with white-grey plumes of smoke reaching 300 to 1,000 meters in height. Lava flows were observed extending 800 to 1,000 meters as far as Besuk Kobokan. Morphological photographs of the summit and surrounding area show distinct changes: large accumulations of eruptive material and lava deposits have disappeared or been eroded, indicating that the pyroclastic flow of November 19, 2025, eroded and transported most of the unstable material around Jonggring Seloko crater.
This low- to medium-intensity eruptive activity was not accompanied by signs of increased magma supply. This observation is corroborated by low volcanic seismic activity, indicating that magmatic pressure at depth did not increase significantly. The seismic velocity variation parameter (dv/v) decreased before the pyroclastic flow event of November 19, 2025, and then stabilized, indicating that the volcanic system was in a relaxation phase and not undergoing pressurization. Inclinometer data did not show a consistent inflation or deflation pattern; therefore, there is no evidence of magmatic deformation after the event. Similarly, GPS, vector, and baseline data showed random movement without significant elongation.
In the absence of significant anomalies in the monitoring data, it can be concluded that current activity is dominated by surface processes such as material accumulation, slope instability, and the release of surface gases. Seismicity and deformation data indicate no evidence of new intrusion or increased magma pressure. The main short-term threat is pyroclastic avalanches and the risk of lahars should rainfall intensity increase.
Based on the analysis and assessment, effective November 29, 2025, at 9:00 AM Western Indonesian Time (WIB), the activity level of Mount Semeru has been downgraded from Level IV (AWAS) to Level III (SIAGA).
Source et photos : PVMBG.
Chile , Laguna del Maule :
Special Volcanic Activity Report (REAV), Maule Region, Laguna del Maule Volcanic Complex, November 29, 2025, 3:00 PM local time (Mainland Chile)
The Chilean National Geology and Mining Service (Sernageomin) announces the following PRELIMINARY information, obtained through the monitoring equipment of the National Volcanic Monitoring Network (RNVV), processed and analyzed at the Southern Andean Volcano Observatory (OVDAS):
On Saturday, November 29, 2025, at 2:44 PM (5:44 PM UTC), monitoring stations installed near the Laguna del Maule volcanic complex recorded activity associated with rock fracturing within the volcanic system.
The characteristics of the highest-energy earthquake after analysis are as follows:
TIME OF ORIGIN: 2:44 PM local time (5:44 PM UTC)
LATITUDE: 36.108° S
LONGITUDE: 70.557° W
DEEP: 5.6 km
LOCAL MAGNITUDE: 3.1 (ML)
Observation: Recurrent seismic activity is observed at the Laguna del Maule volcanic complex, with lower-energy volcano-tectonic (VT) events continuing.
The volcanic technical alert remains at YELLOW.
Source : Sernageomin
Photo : Álvaro Vivanco , Photo prise au Sud-Ouest de la lagune de Maule.
Ecuador , Sangay :
DAILY REPORT ON THE STATE OF SANGAY VOLCANO, Saturday, November 29, 2025.
Geophysical Information Institute – EPN.
Surface Activity Level: Moderate, Surface Trend: No Change
Internal Activity Level: Moderate, Internal Trend: No Change
Seismicity: From November 28, 2025, 11:00 AM to November 29, 2025, 11:00 AM:
Seismicity:
Below is the count of seismic events recorded at the reference station:
Explosion (EXP): 84
Rainfall/Lahars:
No rain has been recorded in the volcanic zone. **Heavy rainfall could remobilize accumulated material, generating mudflows and debris flows that would cascade down the volcano’s flanks and flow into adjacent rivers.**
Ash Column/Emissions:
The GOES-19 satellite system detected a gas and ash plume reaching an altitude of 800 meters above the crater, drifting southwest. The Washington VAAC issued three reports of gas and ash plumes reaching between 900 and 1,500 meters above the crater, also drifting southwest.
Other Monitoring Parameters:
The MIROVA MODIS satellite system recorded two thermal anomalies, MIROVA VIIRS recorded four, and the FIRMS satellite system recorded 19 in the past 24 hours.
Alert level: yellow
Source : IGEPN
Photo : Eqphos_fotografía / FB.
