Simultaneous volcanic unrest in the Philippines and Indonesia is sharpening the focus on accumulation risk for travel-disruption and aviation insurers across Asia-Pacific, as multiple active systems raise the prospect of correlated claims through the region’s peak travel season, against a backdrop of one of the world’s widest catastrophe protection gaps.
Mayon Volcano in the Philippines’ Albay province has been held at Alert Level 3, denoting a high level of volcanic unrest, since Jan. 6, 2026, after the collapse of a summit lava dome generated pyroclastic density currents. PHIVOLCS reported sulphur dioxide emissions averaging 1,281 tonnes per day on Jan. 21 and hundreds of rockfall events in single 24-hour monitoring periods. NASA’s Earth Observatory recorded that daily sulphur dioxide output peaked at 7,633 metric tonnes on March 6, which it described as among the highest single-day readings in 15 years. The alert level was still in force in May, when a pyroclastic density current moved down the Mi-isi Gully.
Indonesia is running in parallel. Its Geological Agency raised the alert on Anak Krakatau in the Sunda Strait to Level III on July 2, 2026, following an eruption that sent an ash plume roughly 200 metres above the summit and set a three-kilometre exclusion zone, according to The Watchers. That came against a backdrop of near-continuous activity: MAGMA Indonesia has logged more than 1,800 eruption events across the country in 2026, with several volcanoes at elevated alert simultaneously, according to VolcanoDB. Indonesia sits on more than 130 active volcanoes along the Pacific Ring of Fire, according to Euronews. For underwriters, the salient feature is not any single mountain but the concentration of active systems intersecting some of the world’s busiest air corridors within one season and one region.
Travel-disruption and aviation policies commonly treat volcanic ash as a defined trigger for trip-cancellation, delay, and interruption coverage. Allianz Partners, for instance, defines a natural disaster to include volcanic eruption and covers related losses under trip-cancellation, trip-interruption, and travel-delay benefits, subject to conditions. When several systems are active at once, the probability of clustered, correlated claims – the scenario that pressures loss ratios – rises accordingly.
The reference point for scale is the 2010 Eyjafjallajökull eruption in Iceland. The International Air Transport Association (IATA) estimated total lost revenue for airlines at approximately US$1.7 billion, with daily losses reaching about US$400 million at the peak, when airspace closures affected 29% of global aviation and roughly 1.2 million passengers a day. More than 95,000 flights were cancelled during the six-day European airspace ban.
Recent Asian episodes are smaller but demonstrate the same transmission mechanism. When Mount Lewotobi Laki-laki erupted in June 2025, at least 32 flights to and from Bali’s Ngurah Rai airport were cancelled, affecting routes to Australia, India, and Singapore, according to Al Jazeera. A further eruption in July 2025 cancelled at least 24 flights linking Bali with Australia, Singapore, and South Korea, according to Euronews.
The commercial backdrop is expansion built on thin coverage. Asia-Pacific is the fastest-growing travel-insurance region globally, with Precedence Research projecting a compound annual growth rate of about 16.73% for the region through 2035, among the higher regional rates cited across major forecasters. Growth is attributed in part to rising outbound travel from China, projected to exceed 180 million departures annually, according to Market Research Future.
In the Philippines, that growth sits over a large exposure gap. The Insurance Commission (IC) reported insurance penetration of 1.78% of gross domestic product in 2025, up from 1.67% in 2024 but below its 2% target and below regional averages, as reported by Philippine Daily Inquirer. GlobalData estimated a catastrophe protection gap of about 98% in the Philippines, against a global average of 58%, indicating the extent of uninsured exposure to natural hazards. Coverage terms compound the effect: policies commonly treat an eruption as a “known event” once official warnings are issued, so cover added after an alert is raised may not respond to that event.
For insurers, that combination – premium growth, low penetration, and a defined but conditional peril – is both an exposure-management consideration and a product-design opportunity, particularly for parametric structures that pay on a defined trigger such as airspace closure or a declared alert level. Parametric disaster cover has already been deployed across several Pacific states, with payouts in 2023 and 2025 reaching affected parties within days of a trigger event, according to the United Nations Development Programme (UNDP).
Underwriters and assistance providers are tracking the same indicators as aviation planners: changes in seismic and tremor activity, sulphur dioxide output, and any acceleration in lava effusion or dome growth that could precede a larger explosive event. Regional volcanic ash advisory centres in Tokyo and Darwin continue to issue frequent advisories, several per day in early July. Neither Mayon’s sustained unrest nor Indonesia’s ongoing activity has halted tourism or scheduled air services. But the persistence of Alert Level 3 at Mayon since January, combined with fresh escalation at Anak Krakatau and continued activity elsewhere in Indonesia, keeps the region in a state of rolling, correlated hazard that will shape travel-disruption exposure through the remainder of the year.
