Large boulders transported by Supertyphoon Yolanda (Haiyan) in Eastern Samar

We all know how much damage Supertyphoon Yolanda (international: Haiyan) brought to the Philippines back in November 2013. For instance,┬ádevastating storm surges wreaked havoc in many places where Yolanda made landfall, most notably in the coastal areas of Samar and Leyte. https://www.youtube.com/watch?v=rS0gv4Xbw7w But one surprising aspect of Supertyphoon Yolanda that hasn't been widely discussed is... Continue Reading →

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A look back at the severe flooding in Central Luzon due to Typhoon Koppu (Lando) in October 2015

On October 17, 2015, Typhoon Koppu (local name: Lando) brought torrential rains in Luzon island, Philippines generating widespread flooding in numerous places across the island. It also caused landslides and debris flows in the province of Nueva Ecija. Extensive flooding in Central Luzon were reported, mainly affecting the province of Pampanga. Waters originated north of... Continue Reading →

A glimmer of hope for Manila Bay?

Manila Bay is not dead, at least not yet. Scientists from De La Salle University and University of the Philippines Manila measured the acidity level of the water in Manila Bay and found that it is still low enough to sustain marine life. And in case the acidity increases, whether naturally or from human activities,... Continue Reading →

AOGS-EGU 2018 Joint Conference poster

This year's Joint AOGS-EGU Conference, with the theme "New Dimensions for Natural Hazards in Asia", was held here in the Philippines last February 4-8. I was able to present a poster about detecting co-seismic ground deformation using InSAR.

What are debris flows?

Last time, I mentioned that what hit Mocoa, Colombia were not floods or mudflows, but debris flows. But what exactly is a "debris flow?" This term isn't very well-known, at least in popular usage. Indeed, numerous reports describe the Mocoa tragedy as caused by either a mudflow, mudslide, or a landslide (which is technically correct,... Continue Reading →

Mayon Volcano lava flows

(Image above: False color composite generated from Sentinel-2 data draped over Google Earth terrain) Although I've been to several volcanoes and have studied and worked on volcanic deposits before, this is the first time I've seen an eruption in person. I posted photos from our trip to Mayon, where we tried to document the eruption,... Continue Reading →

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