Dr. Teresito C. Bacolcol

TERESITO “Toto” C. Bacolcol stands as one of the country’s foremost authorities in geophysics, seismic hazard science, and crustal deformation studies — an expert whose work has helped shape the Philippines’ modern understanding of earthquakes, active faults, and volcanic behavior. Born on 31 March 1973 in Zamboanga del Norte, he went on to build a distinguished scientific career marked by scholarship, leadership, and unwavering public service.

A product of the University of the Philippines Diliman, where he completed his Bachelor of Science in Geology, Bacolcol pursued advanced graduate studies at Université Pierre et Marie Curie (Paris VI) in France, earning both the DEA and PhD in geodesy and earth sciences. His doctoral research on the Philippine Fault system — one of the world’s most complex tectonic structures — laid the groundwork for what would become a lifelong commitment to understanding the geodynamic forces shaping the archipelago.

His career at the Philippine Institute of Volcanology and Seismology (PHIVOLCS) spans nearly three decades, beginning in 1997 as a Science Research Specialist. His competence and dedication steadily propelled him through the institution’s ranks: Associate Scientist, Director III, and ultimately Director IV, the agency’s highest technical and executive leadership post. In this role, he oversees national programs on earthquake monitoring, GPS geodesy, volcanic surveillance, and geohazard risk reduction — responsibilities crucial to safeguarding millions of Filipinos in one of the world’s most hazard-prone nations.

Bacolcol’s scientific expertise is deep and multifaceted. His specialization in GPS geodesy, crustal deformation, and active fault motions has made him a key figure in Philippine seismic research. His extensive body of work includes publications in top-tier international journals, covering subjects such as interseismic deformation along major subduction zones, fault coupling, block motions, volcanic ground deformation, and probabilistic seismic hazard analysis. His research on the 2022 MW 7.0 Abra earthquake, the dynamics of the Philippine Mobile Belt, and the Manila Trench has contributed significantly to global understanding of tectonics in Southeast Asia.

Across his career, he has authored and co-authored numerous PHIVOLCS Open File Reports, documenting critical scientific insights following earthquakes in Surigao del Sur (2023), Cotabato (2019), Leyte (2017), and Bohol (2013). These reports serve as essential references for government agencies, local DRRM offices, planners, and researchers, directly influencing policy, risk assessments, and preparedness strategies.

His contributions extend beyond research. Bacolcol is an active figure in the global earth-sciences community, representing the Philippines in international workshops, conferences, and hazard-mitigation programs. He has served as a Visiting Scientist at Nagoya University, a Postdoctoral Fellow at Academia Sinica, and a panelist or resource speaker in key gatherings organized by UNESCO, CTBTO, the World Bank, and the Asia-Pacific regional scientific community. His participation in multilateral seismic and geodetic collaborations — particularly long-standing partnerships with Japan and Taiwan — has helped bring advanced scientific methodologies and monitoring technologies into the Philippine context.

In recognition of his contributions, Bacolcol has received numerous honors, including the Dangal ng Pilipino Award for Enhancing Competence and Resilience (2025) conferred by the Office of Civil Defense, the PHIVOLCS Model Employee Award, and academic accolades such as the Most Outstanding Capstone Paper and With Honors from the Development Academy of the Philippines. In 2024, he achieved the rank of Career Executive Service Officer (CESO III), underscoring his stature as both a scientist and a senior public-sector leader.

He maintains active involvement in professional organizations, notably the Geological Society of the Philippines — where he once served as Trustee, Vice President, and Assistant Secretary — and the UP Geology Alumni Association. He is also part of the CHED Technical Committee for Geology, helping guide the academic standards and future direction of geology education in the Philippines.

Quietly dedicated yet visibly impactful, Teresito C. Bacolcol embodies the modern Filipino scientist: rigorously trained, globally engaged, committed to public service, and deeply invested in safeguarding communities. Through his leadership at PHIVOLCS and his extensive body of scientific work, he continues to strengthen the nation’s resilience to geohazards and contribute to the broader global effort to understand and mitigate the risks posed by the earth’s most dynamic processes.