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26 Sep 2018 description

Situational Analysis

Description of the disaster

Mayon Volcano is in Albay province in the Bicol region, around 300 km southeast of the Philippine capital, Manila. On 13 January 2018, Mayon heightened activities, generating steam and ash. As the day progressed, more phreatic eruptions occur, the Philippine Institute of Volcanology and Seismology (PHILVOLCS) raised Mayon from alert level I (abnormal) until alert level IV (hazardous eruption imminent).

09 Apr 2018 description

Regional Summary (Week 14)

1) Disasters recorded in Week 14 were hydro-meteorological and volcanic in nature with the exception of an oil spill in Indonesia

2) Thailand Meteorological Department had issued a summer storm warning for north-eastern and eastern provinces for Week 14. Hailstorm had been recorded in Khon Kaen destroying 107 roofs of houses in the process.

04 Apr 2018 description

SUMMARY

This is the final report on the Mayon Phreatomagmatic Eruption following its decreased tendency towards hazardous eruption and the lowering of its Alert Level to Level 2, as well as the return of Internally Displaced Persons (IDPs) to their respective places of origin.

Status of Affected Families / Persons

23,786 families or 91,055 persons in 61 barangays in Albay were affected by the phreatomagmatic eruption of Mayon Volcano (see Table 1).

Status of Displaced Families

03 Apr 2018 description

Since January 2018, over 90,000 people were evacuated due to the eruption of Mayon volcano. With still more than 65,000 people in evacuation camps at the beginning of March, the alert level was lowered from ‘4’ (hazardous eruption within days) to ‘3’ (hazardous eruption within weeks) on 6 March, which gradually allowed the majority of the displaced residents to return to their homes.

03 Apr 2018 description

Highlights

  • The Government of the Philippines and international humanitarian organizations exercise their response plans for a 7.2 magnitude earthquake in Metro Manila.

  • Effective local leadership and inclusive partnerships are key to a successful response to the Mayon volcano eruption.

  • Food, protection and livelihoods are among the top unmet needs facing returnees and people still displaced by the Marawi conflict.

FIGURES

Marawi Conflict

02 Apr 2018 description

Regional Summary (Week 13)

1) Most of disasters in Week 13 were hydro-meteorological in nature with minor floods, strong wind and landslides in Indonesia, Singapore and Thailand. Thailand Meteorological Department issued a summer storm warning for northeastern and eastern provinces for Week 14.

02 Apr 2018 description

Mayon Volcano’s seismic monitoring network recorded three (3) volcanic earthquakes during the past 24 hours. The crater could not be observed due to thick clouds covering the summit. Sulfur dioxide (SO2) emission was measured at an average of 1062 tonnes/day on 26 March 2018. Medium-term deflation has been recorded by electronic tiltmeter and Precise Leveling (PL) surveys since 20 February 2018 despite short-term episodes of inflation at the lower and middle slopes.

31 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2,500 meters high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Due to Mayon’s decreased tendency towards hazardous eruption, the Alert Level status of the volcano has been downgraded to Level 2 as of 8AM today, March 29, 2018.

Source: DOST-PHILVOCS (Philippine Institute of Volcanology and Seismology)

26 Mar 2018 description

Regional Summary (Week 12)

1) Most of disasters occurred were hydro-meteorological in nature with floods in Indonesia and strong wind in Thailand recorded.

2) In Philippines, volcanic activities of Mount Mayon still affected people in Albay Province. In Indonesia, Mount Ijen released toxic gas and forced evacuation of nearby villages.

3) AHA Centre also monitored several > M 5.0 earthquakes in in Indonesia and Philippines in Week 12, although they did not caused any damages and triggered disaster declaration.

26 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2,500 meters high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

23 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2,500 meters high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

22 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2,500 meters high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

21 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2,500 meters high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

20 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2500 m high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

19 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2500 m high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

18 Mar 2018 description

Regional Summary (Week 11)

1) Most of disasters occurred in Indonesia were due to hydro-meteorological hazards with floods and landslide recorded. AHA Centre also monitored several strong wind events in Indonesia, although they did not caused any damages and disaster declaration.

2) In Philippines, geological hazards still disrupting daily lives of people with Mount Mayon volcanic activities in Albay Province. Also, M 5.0 earthquake was recorded in Bukidnon Province on 15 March 2018, with Talakag city felt intensity V and VI (MMI) and it caused some damages.

17 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2500 m high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

16 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2500 m high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.

16 Mar 2018 description

SUMMARY

On 13 January 2018 at 4:21 PM, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2500 m high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes.

Characterized by a general decline in unrest reflected by moderate seismicity and degassing, deflation of the edifice, and a decrease in eruptive activity at the summit crater, the Alert Level of the volcano has been downgraded to Level 3 on 06 March 2018.