We all know how much damage Supertyphoon Yolanda (international: Haiyan) brought to the Philippines back in November 2013. For instance, devastating 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 →
In December last year, two typhoons hit the Philippines: Urduja (international: Kai-Tak) and Vinta (international: Tembin). Both weren't particularly strong typhoons (at least from what we experience in the Philippines); Urduja peaked at Category 1 and Vinta as a Tropical Storm in the Saffir-Simpson Scale. What made the two typhoons deadly were the excessive rainfall... Continue Reading →
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 →
In 2016, two mountains in Mindanao were affected by separate fires--Mt. Piapayungan and Mt. Apo. I wanted to see how the areas have recovered after two years, especially since I helped a little bit with the Mt. Apo response team, so I downloaded some satellite images from the Sentinel 2 and Landsat 8. From the... Continue Reading →
A bit of a good news on Mayon: PHIVOLCS has lowered the alert level to Alert Level 3. Hopefully, things will go back to normal and all those affected will be able to go back to their homes. In the meantime, here are two of the latest satellite images of Mayon from Sentinel 2 since... Continue Reading →
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 →
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.
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 →
(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 →
Mayon Volcano, the most active volcano in the Philippines, is erupting again. The activity started last January, and it's still continuing until now. Eruption types have ranged from Strombolian to Vulcanian. The volcano is continuously degassing, with some occasional lava fountaining. Here are some photos I took when got a chance to go there.