Mayon Volcano Phreatic Eruption, TUESDAY 23 JAN 2018 Albay Province, Philippines 12:00 UTC+7 Flash Update No

Mayon Volcano Phreatic Eruption, TUESDAY 23 JAN 2018 Albay Province, Philippines 12:00 UTC+7 Flash Update No. 03 adinet.ahacentre.org/reports/view/1043

1) DOST-PHIVOLCS raised Mt. Mayon’s status to Alert Level 4 (hazardous eruption imminent) at 22-Jan-2018 13:00 UTC+8.  Public is advised to stay vigilant against pyroclastic flows, lahars and sediment- laden stream flows  Civil aviation authorities are advising pilots to avoid flying close to volcano summit as ash can be hazardous to aircraft.  Respiratory ailments may be triggered or worsened with the inhalation of ash particles. Public is advised to wear protective gear (e.g. google or N95 mask) should they experience discomfort. 2) A total of 12,214 families / 48,614 persons were affected in 39 barangays in 8 cities/municipalities in Albay Province (Department of Social Welfare & Development). 3) Hazard maps are available from DOST-PHIVOLCS. 4) Philippine Red Cross has been carrying out hygiene promotion, conducting psychosocial support services and providing clean water in affected areas.

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 Mayon volcano is located in Southeast Luzon. It is the most active volcano in the Philippines with a height of 2462 metres.  Know to the locals as Daragang Magayon (Bicolano words for "beautiful lady"), the volcano is temperamental, erupting nearly 50 times since its first recorded explosion in 1616.  It has a classic and beautiful symmetrical profile with steep upper slopes averaging 35-40 degrees.  Frequent eruptions produce pyroclastic flows, lahars (mud flows) and ash falls triggering large scale evacuations  Historical records date back to 1616 and ranged from strombolian to basaltic plinian. From Cas and Wright, 1987

Notable Eruptions and Volcanic events 13 Jan 2018 to present Stream driven explosion was 2nd recorded The 2nd most destructive explosion A surprised recorded at 1706hrs, eruption of Mayon was recorded. This even claimed phreatic eruption producing a 2.5km being a Vulcanian the lives of 350 people where lasting 73 seconds grayish ash plume

type eruption. pyroclastic flow were occurred, drifting towards the

23 23 Jul 1897 7 May 7 May 2013

24 24 Jul 1766 Pyroclastic and lava characterised by hot water and producing ash, southwest. – – flows produced rocks. steam and rocks. At 2049hrs, a phreatic

20 20 major damages, This event claimed eruption was recorded

killing 39 people in A violent phase of 17 hours was the lives of 5 with ash fall expected 4 4 Jun its path. recorded before a strong climbers and on the west and Vulcanian blast was recorded injuring 7. southwest slopes. Courtesy of PHIVOLCS

The eruption was characterised The eruption with pyroclastic flows, volcanic which caused lightning and lahars (mud flows). pyroclastic flows

4 Apr Apr 4 1993 killed 77 people A total of 1,200 casualties were – mostly farmers.

1 1 Feb 1814 recorded and the historical Cagsawa church remains partly Explosion type buried in lahar (10km away) 1 1 Feb seismic signals serves as a reminder of that increased on 15 event (see figure). March with new lava flow being It was described as the most observed at the destructive in terms of casualties summit. and distance that the volcanic Image source: hazards reach from the crater. http://www.yoursgracefully.com/?p=74 Courtesy of PHIVOLCS