Surigao, Philippines: Examining Damages after the 6.7-magnitude Earthquake on February 10, 2017

From February 23 to February 25, 2017, Carl and Linnel from our engineering team in the Philippines performed post-earthquake reconnaissance following the 6.7 earthquake in Surigao Del Norte, on the north side of the island Mindinao. The team investigated and documented the response of rural school buildings and informal urban housing in the area, which will help inform our retrofit efforts in Manila and further our understanding of the seismic vulnerability of school buildings. The highest concentration of damaged housing exists in Surigao City, and San Francisco has experienced the most significant damage to schools. Unfortunately, San Francisco is inaccessible due to collapsed bridges and damaged roadways, and the team’s efforts have therefore been focused in Surigao City. Surigao City is a moderately dense city with a population of about 160,000 people. The team flew into Butuan on Thursday, about 4 … Read More

Day 1: Guayaquil to Manta- A First Look at Damaged Houses

May 1st was our first full day in Ecuador, after landing in Guayaquil on April 30.  Our team has three members: Traveling from our Bogota office there is Juan Caballero, architect and Director of Programs and Partnerships for Latin American, and Walter Cano, structural engineer and Project Engineer for Colombia.  From the U.S./headquarters there is Lizzie Blaisdell, structural engineer and Director of Engineering. In Guayaquil, we saw little evidence of an earthquake.  According to the preliminary report on the Instituto Geofisico website (http://www.igepn.edu.ec/) a strong motion sensor near Guayaquil, “AGYE” experienced a maximum ground acceleration of 23.04 cm/s2 (approx. 2%g) while another just east of the area, “AMIL” recorded a maximum acceleration of 51.04 cm/s2 (approx. 5%g).  As a point of comparison, the new Norma Ecuatoriana de la Construccion (Ecuadorian Construction Code) considers the seismic zone factor, Z, to be 0.4.  For … Read More