January 31 , 2025.
Indonesia , Lokon-Empung :
Decrease in the activity level of Mount Lokon from level III (SIAGA) to level II (WASPADA) on January 31, 2025 at 06:00 WITA.
Mount Lokon is located in the administrative city of Tomohon, North Sulawesi Province, with a geographical position at 1021’30 » N latitude and 124047’30 » E longitude with a maximum height of approximately 1,579 m above sea level (basic volcanic data). The volcanic activity of Mount Lokon is monitored visually and instrumentally from the Volcano Observation Post (PPGA) located in Kakaskasen Village, North Tomohon District, Tomohon City, North Sulawesi Province.
The last eruption occurred in 2011 in the form of an ash eruption and the ejection of incandescent material that fell back around the crater. The activity level of Mount Lokon has been level III (SIAGA) since 10 November 2024. The volcanic activity of the smoke from the crater from December 2024 to 10 January 2025 is generally white, weak to moderate, about 15 to 25 metres high. Earthquakes are dominated by shallow volcanic earthquakes, recorded at a rate of between 1 and 102 events per day.
The latest developments on G. Lokon as of 29 January 2025 are as follows:
In January 2025, smoke from the crater was visually observed to be white and thin with a height generally of 10 m above the peak, which was previously about 15 m above the peak. Instrumentally, there has been a decrease in seismic activity, especially shallow volcanic earthquakes since 1 and until 29 January 2025. The earthquakes show a decrease in the number of earthquakes, where on 2 January 2025, 102 shallow volcanic earthquakes were recorded per day and this condition gradually decreased until 15 January 2025, 15 shallow volcanic earthquakes were recorded per day and from 20 to 29 January 2025, the number of recorded earthquakes varied between 1 and 5 events per day.
According to instrumental data, there is an indication of a decrease in pressure in the shallow part (surface) after the recording of a shallow volcanic earthquake associated with the release of gas eruptions.
The potential hazard threat from the activity of Mount Lokon at present is the occurrence of an eruption caused by a sudden contact of magma vapor with hydrothermal water with or without indications of a significant increase. During the rainy season or when there is heavy rain at the summit of Mount Lokon, be aware of the possibility of lahars descending into the rivers that originate at the summit of Mount Lokon.
Based on the results of observations, analysis and evaluation of visual and instrumental data, the activity level of Mount Lokon has been lowered from level III (SIAGA) to level II (WASPADA) since 31 January 2025 at 06:00 WITA.
Source : PVMBG
Photo : G VITTON (2019).
Colomba , Chiles / Cerro Negro :
San Juan de Pasto, January 28, 2025, 4:10 p.m. .
Following the monitoring of the activity of the Chiles and Cerro Negro volcanoes, the Colombian Geological Survey (SGC), an entity attached to the Ministry of Mines and Energy, reports that:
During the week of January 21 to 27, 2025, volcanic activity showed a decrease in seismic behavior. Compared to the previous week, the main variations in the monitored parameters were:
• Both the occurrence and the released seismic energy showed a decrease.
The predominance of seismicity related to rock fracture within the volcanic edifice continued, in parallel with the significant recording of earthquakes associated with the movement of fluids in the volcanic system. In general, the fracture earthquakes recorded were of low energy level.
• The earthquakes associated with fracturing were located in three sources: the first in the area known as the Chiles Volcano Collapse Zone, extending from its summit, approximately 2 km to the north and at a depth of between 2 and 5 km, relative to the summit of the volcano (4700 m above sea level). The second source was located in the southeast sector of the Chiles volcano, at distances of less than 14 km, with depths of between 8 and 12 km from its summit and a maximum magnitude of 2.4. The third source was located northeast of the Cerro Negro volcano, at distances of less than 2 km and at depths of between 2 and 5 km.
• Instruments that record crustal deformation and remote satellite sensors continue to show changes related to an inflationary process in this volcanic area.
Based on the above, the SGC recommends closely monitoring the developments through weekly bulletins and other information published through our official channels, as well as instructions from local and departmental authorities and the National Disaster Risk Management Unit (UNGRD).
Volcanic activity remains in yellow alert status: active volcano with changes in the behavior of the base level of monitored parameters and other manifestations.
Source et photo : SGC
Hawaii , Kilauea :
Thursday, January 30, 2025, 9:32 AM HST (Thursday, January 30, 2025, 19:32 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:
Kīlauea summit eruption paused as of January 28. A new eruptive episode may begin within the next 1-4 days in Hawai’i Volcanoes National Park.
Episode 7 of the ongoing Halemaʻumaʻu eruption ended abruptly at 10:47 a.m. HST on January 28 after about 16 hours of eruptive activity. Kīlauea’s current eruption in Halemaʻumaʻu crater within Kaluapele (the summit caldera) began on December 23, 2024. There have been 7 episodes of lava fountaining separated by pauses in activity. The eruption may resume within the next 1-4 days based on current rates of summit inflation. Seismicity remains low. All eruptive activity has occurred in Hawai’i Volcanoes National Park. No unusual activity has been noted along Kīlauea’s East Rift Zone or Southwest Rift Zone.
Current hazards include volcanic gas emissions and windblown volcanic glass (Pele’s Hair) that may impact Hawai’i Volcanoes National Park and nearby communities.
Two USGS Hawaiian Volcano Observatory scientists use a rock hammer to sample the flow from episode five of the recent eruption at Kīlauea summit, which has now cooled and hardened to solid rock.
Summit Observations:
Lava fountains and flows erupting from the south vent within Halema’uma’u crater stopped erupting just after 10:43 a.m. HST on Janurary 28. The north vent shut down five minutes later at 10:47 a.m. HST. Lava flows from episode 7 covered nearly half of Halemaʻumaʻu crater floor. Spots of orange glow may still be seen on the crater floor as the erupted lava continues to cool. Glow from the eruptive vents and continued degassing indicates that magma remains close to the surface.
The Uēkahuna tiltmeter (UWD) recorded more than 7 microradians of deflationary tilt during episode 7, more than twice the amount recorded during episodes 5 and 6. As episode 7 ended there was a rapid change in summit tilt from deflation to inflation along with a decrease in seismic tremor intensity. UWD has recorded just under 5 microradians of inflationary tilt since the end of episode 7. No significant earthquake activity was recorded in the summit region over the past 24 hours. Low level seismic tremor continues.
Weather conditions and episode timing have prevented accurate measurements of sulfur dioxide (SO2) emission rate since earlier in the eruption sequence. Based on emissions measured during earlier episodes and pauses, SO2 emission rates are currently estimated to be near 1,000 t/d.
Source : HVO
Photo : USGS / J. Barnett.
Peru , Sabancaya :
Analysis period: from January 20, 2025 to January 26, 2025, Arequipa, January 27, 2025
Alert level: ORANGE
The Geophysical Institute of Peru (IGP) reports that the eruptive activity of the Sabancaya volcano continues. During this period, an average of 3 explosions per day have been recorded, with columns of ash and gas up to 500 m above sea level above the summit of the volcano. Therefore, the volcanic alert level remains at ORANGE
The IGP has recorded and analyzed the occurrence of 99 earthquakes of volcanic origin, associated with the circulation of magmatic fluids inside the Sabancaya volcano, as well as earthquakes related to rock fracturing. An average of 3 explosions per day have been recorded.
Columns of ash and gas were observed up to 500 m above the summit of the volcano. The predominant direction of these emissions was towards the West and South-West sector of the volcano over a distance of less than 10 KM.
No significant deformation of the volcanic edifice was recorded.
No thermal anomalies were identified.
Moderate emissions (814 tons/day) of sulfur dioxide (SO2) were observed
RECOMMENDATIONS
• Keep the orange volcanic alert level.
• Do not approach within a radius of less than 12 km from the crater.
Source : Cenvul
Photo : Zintia Roxana Fernández Licla
Mexico , Popocatepetl :
January 30, 11:00 (January 30, 17:00 GMT)
Activity in the last 24 hours
170 exhalations were detected, accompanied by water vapor, volcanic gases and small amounts of ash; In addition, 31 minutes of very low amplitude tremor were recorded.
During the morning and at the time of this report, a continuous emission of water vapor and volcanic gases was observed in a Northeast (NE) direction.
The Popocatépetl volcanic alert traffic light is at yellow phase 2.
The scenarios anticipated for this phase are:
A few minor to medium-sized explosions
Appearance of a tremor of varying amplitude
Light to moderate ash rains in the surrounding towns and in some more distant towns
Ejection of incandescent fragments within a 12-kilometer exclusion radius
Lahars are likely to occur in the ravines, due to the accumulation of ash on the slopes and their interaction with the rains expected in the coming weeks.
Possibility of pyroclastic flows not reaching the populations
Source et photo : Cenapred.
