November 25 , 2025.

Hawaii , Kilauea :

HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE , U.S. Geological Survey .
Monday, November 24, 2025, 12:17 PM HST (Monday, November 24, 2025, 22:17 UTC)

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary:
Periodic dome fountain overflows from the south vent ceased just after midnight last night; however, strong glow and intermittent spatter continued throughout the night. No overflows have been recorded at north vent since early Saturday morning. After two minor deflationary events yesterday, inflation continues to be recorded by summit tiltmeters. We are currently in the forecast window for episode 37. Following yesterday’s deflation, new models forecast episode 37 to occur between November 25 and November 28, with a slight possibility through today.

Summit Observations:
Periodic dome fountain overflows from the south vent continued yesterday at a rate of approximately once per hour, with each flow lasting roughly 30-40 minutes. The last overflow ceased at 12:10 a.m. last night, replaced by strong glow and occasional spatter. North vent has continued to glow, though little spatter and no overflows have been seen since early Saturday morning. There have been 73 overflows from the summit vents since overflows began on Friday at 9:30 a.m. HST. Overflows alternated between the vents on Friday but have been largely from the south vent since Friday evening. Temporary increases in tremor were associated with lava drain back during overflow events.

Low level seismic tremor continues to be recorded from the summit, with minor tremor bursts suggesting a return to gas pistoning behavior at the vents.

Two deflationary events were recorded yesterday with a total of -0.6 microradians of deflationary tilt recorded at the Uēkahuna tiltmeter (UWD) tiltmeter. Inflation resumed at the summit upon cessation of overflows. The Sandhill (SDH) and Summercamp (SMC) tiltmeters are recording a steady climb compared to UWD, which has recorded little movement overnight.

Plumes of gas are visible from both the south and north vents. Sulfur dioxide (SO2) gas emissions increased yesterday to approximately 4000 tonnes per day during a period of deflation, but have since returned to typical eruption pause levels, between 1,200 and 1,500 tonnes per day.

Source et photo : HVO

Kamchatka , Bezymianny :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)

Issued: November 24 , 2025
Volcano: Bezymianny (CAVW #300250)
Current aviation colour code: ORANGE
Previous aviation colour code: orange
Source: KVERT
Notice Number: 2025-138
Volcano Location: N 55 deg 58 min E 160 deg 35 min
Area: Kamchatka, Russia
Summit Elevation: 2882 m (9452.96 ft)

Volcanic Activity Summary:
An effusive activity of the volcano is increasing, this is accompanied by powerful gas-steam emissions and numerous hot avalanches. Satellite data by KVERT showed a large thermal anomaly over the volcano last days with a high value of temperature difference between the thermal anomaly and the background. The volcano is preparing for a paroxismal explosive eruption. KVERT continues to monitor the Bezymianny volcano.
An effusive activity of the Bezymianny volcano is increasing, the volcano is preparing for a strong explosive eruption. Possibly, ash explosions up to 10-15 km (32,800-49,200 ft) a.s.l. could occur in the next 24 hours. Ongoing activity could affect international and low-flying aircrafts.

Volcanic cloud height: NO ASH CLOUD PRODUSED

Other volcanic cloud information: NO ASH CLOUD PRODUSED

Remarks:
The last explosive eruption of Bezymianny volcano occurred on 23-24 April, 2025.

Source : Kvert.

Photo : S. Chirkov, IVS FEB RAS ( archive)

Indonesia , Bur Ni Telong :

The activity level of Bur Ni Telong volcano in Aceh province was raised from Level I (normal) to Level II (WASPADA) on November 25, 2025.

Bur Ni Telong volcano (2,623 meters above sea level) is a stratovolcano administratively located in the Bener Meriah Regency, Aceh province. On November 25, 2025, at 12:30 a.m. West Indonesia Time, a magnitude 4.3 tectonic earthquake occurred, with its epicenter located 15 km northeast of the Bener Meriah Regency, approximately 16 km from the volcano’s crater. This earthquake was followed by increased seismic activity at Bur Ni Telong volcano. Between midnight and 6 a.m. (Jakarta time), 18 deep volcanic earthquakes, 6 local tectonic earthquakes and 6 distant tectonic earthquakes were recorded.

The current increase in seismicity is linked to heightened regional tectonic activity around Mount Burni Telong. This has resulted in an increase in both local and distant tectonic earthquakes in the area. This situation has persisted since July 2025, with an increase of six deep volcanic earthquakes observed. No crater plume activity has been visually observed.

Mount Burni Telong presents a potential risk of eruption, whether triggered by a nearby tectonic earthquake or occurring without a significant increase in seismicity. Another potential hazard lies in the release of volcanic gases around solfataras and fumaroles. This risk can be dangerous if the concentration of inhaled gases exceeds the safety threshold. Based on visual and instrumental observations, the activity level of Mount Bur Ni Telong has been raised from Level I (normal) to Level II (wasapada) effective November 25, 2025 at 09:00 WIB, with recommendations to the public and visitors/climbers not to approach the Bur Ni Telong crater area within a 1.5 km radius and not to be in fumarole and solfatara areas during cloudy or rainy weather, as the gas concentration may be dangerous to life.

Source : PVMBG.

Photo : rafina2802 /wordpress.com

La Martinique , Mount Pelée :

Weekly Report, Paris Institute of Earth Physics / Martinique Volcanological and Seismological Observatory
Saint-Pierre, November 21, 2025, 4:00 PM local time (GMT-4)

Volcanic activity increased this week with 235 volcanic earthquakes observed.

Between November 14, 2025, 4:00 PM UTC and November 21, 2025, 4:00 PM UTC, the Martinique Volcanological and Seismological Observatory recorded:
– 218 shallow volcano-tectonic earthquakes. Among them, 4 had a magnitude (duration magnitude Md or local magnitude Mlv) greater than 0.5. The largest had a magnitude Mlv of 1.27. The others were of lower energy. These earthquakes originated from the well-known seismically active zones of Mount Pelée, located between 1.0 and 1.4 km below the volcano’s summit. Shallow volcano-tectonic seismicity is associated with microfracturing within the volcanic edifice, linked to the overall reactivation of the volcano observed since 2019.
– 16 shallow hybrid earthquakes and 1 shallow long-period earthquake were recorded. They are located in the same area as the shallow volcano-tectonic earthquakes. The largest had a magnitude of Mlv = 0.71. The shallow hybrid earthquakes exhibit low-frequency enriched signals and are associated with the circulation of fluids (gases, hydrothermal fluids) within the volcanic edifice.

No earthquakes were felt by the population.

The previous week, the OVSM (Mountain Seismological Observatory) recorded 59 earthquakes of volcanic origin. As of November 21, 2025, and over the past four weeks, the OVSM has therefore observed a total of 569 volcanic earthquakes, an average of 142 to 143 earthquakes per week.
During phases of volcanic reactivation of volcanoes similar to Mount Pelée, it is common to observe seismic activity that varies in intensity and frequency. The probability of an eruptive activity in the short term remains low. However, considering all the observations collected since the end of 2018 and their nature, and based on recent observations from the OVSM-IPGP (Paris Institute of Earth Physics), we cannot rule out a change in the situation in the medium term (weeks, months).
For more details on observations and interpretations of volcanic activity over the longer term, please refer to the OVSM’s monthly bulletins.

The volcanic alert level, in accordance with the measures put in place by the authorities, is currently YELLOW: vigilance.

Magnitude 4.4, 14.99°N, 60.39°W, depth 30 km, Sunday, November 23, 2025, 9:22 PM UTC
An earthquake (magnitude 4.4) was recorded on Sunday, November 23, 2025, at 5:22 PM (local time) and identified as being of tectonic origin. The epicenter was located 67 km east-northeast of Trinidad, at a depth of 30 km (corresponding to a hypocentral distance of approximately 74 km). This earthquake may have generated, in the nearest affected areas, an average ground acceleration of 2.6 mg (*), corresponding to a macroseismic intensity of II-III (rarely felt). Depending on the soil type, however, the intensities may have locally reached intensity IV (largely res

Source : Direction de l’OVSM-IPGP.

Photo : Martinique . org .

Costa Rica , Rincon de la Vieja :

Latitude: 10.83°N;
Longitude: 85.34°W;
Altitude: 1916 m.
Current Activity Level: Alert.

Three small eruptions and two exhalations were recorded this week. The largest eruption occurred on Sunday at 6:10 PM. None generated lahars. Sporadic pulses of brief tremor were observed, with variations in amplitude, frequency, and duration. Volcano-tectonic earthquakes were recorded this week, both near and far from the crater. Long-period and helical earthquakes continue to occur. The number of long-period earthquakes is stable. The dominant frequency of helical earthquakes is not changing significantly.

Geodetic observations show subsidence of the volcanic massif, more pronounced at the summit. This week, DOAS stations recorded a slight increase in SO2 flux (224 ± 137 t/d) compared to the previous week (202 ± 266 t/d).
The MultiGAS station continues to record low gas concentrations, with an H2S/SO2 ratio varying between 0 and 0.8.

Source : Ovsicori

Photo : Christopher Allen