The database contains 4 items.
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Recorded Seismograms of Cebu-Negros Earthquake

By SED, Manila Observatory Davao Station

Recorded seismograms of the February 6, 2012 earthquake off the coasts of Negros and Cebu from the Davao Seismic Station of the Manila Observatory.

Resolving Focal Mechanism Solution’s Ambiguity through Perturbation Applied to Mindoro Earthquakes

By S. S. Su, M. G. C. Cardinal, E. G. Ramos, L. F. Tejones and R. G. Teodoro

The problem of the present study is to determine which of the two planes of a Focal Mechanism Solution (FMS) is the fault plane. In order to resolve this problem of ambiguity, we use the method of perturbation of the fault parameters such as azimuth and dip of the x and y planes. As an example, this method was applied to the FMSs of Mindoro earthquake events (1968-1994), with data obtained from the Bulletin of the International Seismological Center (ISC). An algorithm that uses perturbation has been developed to discriminate between the two planes. For events without Harvard CMT solutions, its FMS were determined from data sets of first P-wave onsets.

17 Feb 2006 landslide buries Barangay Guinsaugon, St. Bernard, Southern Leyte

By F.B. Avila, G.H. Lorenzo, A.R.C. Remedio, M.G. Cardinal and J.B.T. Ong

This poster was disseminated at the height of the rescue operations of the Guinsaugon, Leyte landslide to provide background information to rescue workers and aid organizations. Most of the materials contained in this poster were provided by generous data providers such as NASA Earth Observatory, PhiVolcs, BBC News, Global Land Cover Facility. The topographic map was created at the Manila Observatory using the Global Mapper software and SRTM data from the GLCF.

Scientists investigate recent Philippine landslide

By A. M. A. Lagmay, J. B. T. Ong, D. F. D. Fernandez, M. R. Lapus, R. S. Rodolfo, A. M. P. Tengonciang, J. L. A. Soria, E. G. Baliatan, Z. L. Quimba, C. L. Uichanco, E. M. R. Paguican, A. R. C. Remedio, G. R. H. Lorenzo, W. Valdivia, and F. B. Avila

A massive landslide devastated the community of Barangay Guinsaugon, Municipality of St. Bernard, Southern Leyte Province, Philippines, at about 10:30 local time on 17 February. The landslide occurred along the steep fault scarp of the Philippine Fault Zone (PFZ), a large and active tectonic structure that traverses the entire length of the Philippines [Allen, 1962]. Barangay Guinsaugon is located at the foot of the scarp, directly in the path of the downward moving mass of earth. As of 24 February, the landslide caused 122 confirmed deaths; 1,328 people still are missing.

To assist in the search and rescue operations that followed the landside, a team of geologists and physicists from the University of Philippines (UP-Diliman, Quezon City) and Ateneo de Manila University conducted an investigation of this area on 21-25 February. The UP-Ateneo team provided technical advice on the geology, which included the identification of the type and characteristics of the landslide.