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On 05 June 2023, the alert status of Mayon Volcano was raised to Alert Level 2 (Increasing Unrest) following a sharp increase in the incidence of rockfall from its summit lava dome from an average of 5 events per day in May 2023 to 49 events per day on 5 June 2023. <br /> <br /> Pronounced increases in rockfall signify the extrusion of new lava beneath the summit lava dome, destabilizing this and causing its spalling or collapse. Rockfall activity increased while volcanic earthquake activity was absent to sparse, sulfur dioxide emissions were at background or baseline levels and short-term ground deformation consisted mainly of swelling of the middle to upper slopes of the edifice Days of increased incidence and volume of rockfall based on seismic records were followed by the generation of short pyroclastic density currents (PDCs) or “uson” in the morning of 08 June 2023. The PDCs were emplaced on the Bonga (Legaspi City), Miisi (Daraga) and Basud (Sto. Domingo) Gullies as far as two (2) kilometers from the summit crater. This indicated that new, less degassed lava was already being spalled from the summit dome and that eruption of very slowly extruding magma had slightly increased. <br /> <br /> On 08 June 2023, 12:00 PM, Alert Level 3 (Increased Tendency Towards Hazardous Eruption) was raised. In the evening thereof, incandescent rockfall generated by intermittent collapse of an apparent fluidal lava portion of the summit dome were deposited on the above gullies within a kilometer of the crater. In the early morning on 10 June 2023, a new summit dome impinging a remnant on the southeast crater floor was observed. <br /> <br /> As of 10 June 2023, 7:00 PM, a total of 654 rockfall events and 7 PDCs have been recorded by the Mayon Volcano Network since 01 June 2023. Average sulfur dioxide flux increased beyond baseline levels to 1,205 tonnes/day. All other monitoring parameters remain unchanged. Fair crater glow or “banaag” and incandescent rockfall shed from new fluidal lava at the summit of Mayon Volcano was observed in the night of 10 June 2023. <br /> <br /> As of 11 June 2023, 8:00 AM, Mayon Volcano is at Alert Level 3 which means that it is currently in a relatively high level of unrest as magma is at the crater and hazardous eruption is possible within weeks or even days.

Thu, 08 Jun 2023

Philippines, Mayon Volcanic Activity

Albay, Philippines
VERIFIED
 
ACTIVE
AHA-VO-2023-000549-PHL
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Update on Tropical Cyclone MAWAR (localname Betty), as of 29 May 2023 at 1000 HRS UTC+7 <br /> <br /> Country under monitoring: Philippines <br /> <br /> 1. OVERVIEW: TC MAWAR, currently as a typhoon category, slightly decelerates while moving northwestward over the waters east of Cagayan. <br /> <br /> 2. LOCATION: The centre of the eye of MAWAR was estimated based on all available data at 470 km East of Calayan, Cagayan. <br /> <br /> 3. STRENGTH: Maximum sustained winds of 155 km/h near the centre, gustiness of up to 190 km/h, central pressure of 950 hPa, and strong to typhoon-force winds extend outwards up to 770 km from the centre. <br /> <br /> 3. MOVEMENT: MAWAR is headed Northwestward at 15 km/h. <br /> <br /> 4. FORECAST <br /> Track <br /> a. MAWAR will move generally northwestward slowly today and may become slow-moving or almost stationary on 30-31 May while over the waters east of Batanes. <br /> b. MAWAR will turn north northeastward on 31 May-1 June, and gradually accelerate towards the waters east of Taiwan. <br /> c. MAWAR may exit the Philippine Area of Responsibility (PAR) on 2 June. <br /> <br /> Intensity <br /> a. MAWAR is forecast to steadily weaken over the next five days. <br /> b. MAWAR may be downgraded into a severe tropical storm on 1-2 June, and into a tropical storm on 2-3 June. <br /> <br /> 5. Tropical Cylone Wind Signals (TCWS): At most TCWS no. 2 - Wind threat Gale-Force Winds (minor to moderate threat to lifeand property): Batanes and the northeastern portion of Cagayan including Babuyan Islands - Map Ilustration. <br /> <br /> 6. HAZARD: <br /> Heavy rainfall <br /> - 100-200 mm over Batanes and the eastern portion of Babuyan Islands; and 50-100 mm over the rest of Babuyan Islands, the northern portion of mainland Cagayan, Ilocos Norte, Ilocos Sur, La Union, Abra, and Benguet. <br /> <br /> Severe Winds <br /> - Minor to moderate impacts caused by gale-force winds are likely within the areas where Wind Signal No. 2 is hoisted. <br /> - Minimal to minor impacts from strong winds (i.e., strong breeze to near gale strength) are possible within any of the areas where Wind Signal No.1 is currently in effect <br /> <br /> Typhoon MAWAR strting to enhance the southwest monsoon: <br /> - Occasional to monsoon rains over the western portions of Southern Luzon and Visayas. <br /> - Occasional gusts are possible in the next 24 hours over localities in the eastern portion of Central Luzon, eastern and southern portions of Southern Luzon that are not under any Wind Signal, and most of Visayas.

Sat, 27 May 2023