GENERAL OVERVIEW OF MARCH 2018

Hydro-meteorological disasters, particularly floods, strong winds and storms, continued to dominate disaster occurrence figures in March 2018. During the month, flash-flooding events due to extreme rainfall within a short amount of time, occasionally triggering landslides as a secondary disaster, as evident in several events across Indonesia. Localised strong winds and storms caused damage in Cambodia, Singapore, Thailand and Viet Nam.

In terms of geological hazards, moderate-to-strong earthquakes (≥ M 5.0) were observed in Indonesia, Malaysia and the Philippines, triggering minor local disruptions without having a significant impact on communities. The ASEAN Earthquake Information Center (AEIC) recorded four earthquakes with a magnitude stronger than M 6.0, three of these-originating in Papua New Guinea – were felt as far across as the Papua Province of Indonesia. Volcanic activities of Mount Mayon in the Philippines continued to affect more than 90,000 people in the nearby Albay Province. On Mount Sinabung, Mount Ijen and Mount Dieng (in East and Central Java provinces Indonesia), toxic gas releases were recorded, and while there were no significant eruptions, the release on Mount Ijen prompted a mandatory evacuation of local communities.

OUTLOOK FOR APRIL-MAY 2018

According to the ASEAN Specialised Meteorological Center (ASMC), the April-May 2018 season can expect slightly below-normal to near-normal rainfall. This is forecasted for most parts of Southeast Asia, except the Philippines. During April 2018, slightly above-normal rainfall is forecast over the northern regions of Kali-mantan and Sulawesi, and western parts of Papua in Indonesia. Towards May 2018, slightly below normal rainfall is expected for most parts of Kalimantan (Indonesia, Malaysia and Brunei Darussalam), Sumatra, Java, Bali and the Nusa Tenggara archipelago of Indonesia. ASMC also stated that there is around 60% chance of La Niña conditions lasting until to end of April 2018, and then a return to neutral conditions during May.

Indonesian Centre for Volcanology and Geological Disaster Mitigation PVMBG states that for April 2018, areas in western Sumatra, south of central Java, north-eastern Borneo, eastern Sulawesi and northern Papua will be prone to ground movement inducing, landslide events. Continuous monitoring for potential humani-tarian consequences will also be required due to the activity of Mount Sinabung (‘PVMBG’s arlet level: warning) and Mount Agung (‘PVMBG’s arlet level: watch) in Indonesia, as well as Mount Mayon and Mt. Kanlaon (PHIVOLCS’ alert level 2, – moderate level of unrest) in the Philippines. Moderate-to-strong earthquakes are still expected in the bordering region between Papua (Indonesia) and Papua New Guinea.

Written by : Mizan Bisri, Qing Yuan Pang