Rolly E. Rimando

• Doctor of Philosophy
• Philippine Institute of Volcanology and Seismology

The NNW-trending Central Mindoro Fault (CMF) is an active oblique left-lateral strike-slip fault as determined from offset morphotectonic features such as spurs and streams. Mapping of the trace and determination of the sinistral strike-slip sense of motion of the CMF is essential not only to the assessment of hazards but also to providing a cleare...

Vertical creep along 15 ground ruptures within a 15 km long and 1.5 km wide zone has been occurring along the southeastern part of Metro Manila. Though the unusually high rates of vertical slip point to excessive groundwater withdrawal as the trigger, the evidence presented herein indicates that these may not be simple irregular subsidence fissures...

The macroseismic intensity of the February 6, 2012, Negros Oriental earthquake (MW 6.7), which affected the islands of Negros and Cebu, central Philippines, has been reassessed in this study using the Environmental Seismic Intensity Scale (ESI-2007). This earthquake caused a ∼75-km-long surface rupture along a previously unmapped fault and resulted...

Accelerated creep, primarily through vertical displacement, has been occurring along 15 en-echelon faults belonging to a 15 km-long and 1.5 km-wide, N-S-trending dilational jog of the active West Valley Fault (or West Marikina Valley Fault), on the southeastern part of Metro Manila, Philippines. The much-larger-than-known tectonic slip rates had be...

One of the reasons for the large number of reported casualties, losses, and damage whenever a disaster strikes is the lack of people's understanding of hazards, risks, and other aspects of disaster readiness and risk reduction (DRRR). DRRR is not an easy topic as it is quite broad and multidisciplinary in nature. Going over a large volume of learni...

A 75 km-long, generally NE-striking ground rupture associated with the 6 February 2012 Mw 6.7 (Mb 6.9) Negros earthquake was mapped on the eastern side of Negros Island, Philippines. It closely follows a previously unmapped, pre-existing fault trace along the coast which is marked mostly by terrace-forming scarps. The dominance of vertical separati...

The Vigan-Aggao Fault is a 140-km-long complex active fault system consisting of multiple traces in the westernmost part of the Philippine Fault Zone (PFZ) in northern Luzon, the Philippines. In this paper, its traces, segmentation, and oblique left-lateral strike-slip motion are determined from horizontal and vertical displacements measured from o...

This book is consistent with the aim of the K to 12 Science Program. Teaching science is a very difficult undertaking but is made a bit easier by using the readers’ experience with natural hazards and disasters. In this book, the students learn to use qualitative and quantitative data on natural hazards in making logical inferences. The knowledge a...

This Teacher’s Resource Material (TRM) for Disaster Readiness and Risk Reduction includes abridged versions of each of the 34 sections. Answer keys are provided in the latter part of each section of the TRM. Whenever applicable, answer explanations and instructions in attacking the questions are included. This TRM includes additional activities on...

Buildings and pavements are damaged by ground vertical displacement along the creeping segment of the Marikina Valley fault system (MVFS) on the southern part of Metro Manila, Philippines. To understand the character of fault creep along the MVFS, deformation is monitored through repeated levelling surveys. Any short term link between fault displac...

To clarify fault creep trigger along a creeping segment of the Marikina Valley fault system (MVFS) on the south-eastern part of Metro Manila, Philippines, ground deformation has continuously been monitored through periodic leveling surveys since 1999 and through creepmeters installed across the MVFS' creeping zone since 2008. From the creepmeter at...

Covers the basics and applied aspects of disaster risk, natural hazards, and community-based disaster risk reduction and management. The book builds on the readers' experience with natural hazards and disasters. The students learn to use qualitative and quantitative data on natural hazards in making logical inferences. The knowledge acquired can t...

This Teacher’s Resource Manual (TRM) for Disaster Readiness and Risk Reduction includes abridged versions of each of the 34 sections. Answer keys are provided in the latter part of the TRM. Whenever applicable, answer explanations and instructions in attacking the questions are included. This TRM includes additional activities aside from those alre...

Presentation of the results of monitoring creep displacement along the creeping segment of the West Valley Fault on the sou theastern part of Metro Manila (Philippines) through periodic deformation surveys (using digital level) and continuous creep measuring device.

Buildings and pavements are damaged by vertical ground displacement along the creeping segment of the Marikina Valley fault system (MVFS) on the south-east part of Metro Manila, Philippines. To clarify fault creep trigger, ground deformation is monitored through repeated leveling surveys. And short term link between fault displacement and rainfall...

An update on the monitoring of displacement along the creeping segment of the West Valley Fault of the Marikina Valley Fault System using a continuous creep measuring device.

A 75 km-long, NNE-oriented ground rupture associated with the February 06, 2012 Negros earthquake (Mb 6.9) was mapped on the eastern side of the island from Vallehermoso to the north and Bindoy to the south. The ground rupture length and scarp heights are consistent with an earthquake of its magnitude and nature of movement. The dominance of vertic...

Metro Manila, in the Philippines, is the nation’s center of politics, economy, and culture. It has rapidly grown into an overcrowded mega city with an economically active population of at least 10 million. On the eastern portion of Metro Manila lies the active Marikina Valley fault system (MVFS). According to results of a trench survey (Nelson et a...

Buildings and pavements are damaged by vertical ground displacement along the creeping segment of the Marikina Valley fault system (MVFS) on the south-east part of Metro Manila, Philippines. To clarify fault creep trigger, ground deformation is monitored through repeated leveling surveys. And short term link between fault displacement and rainfall...

Continuous monitoring of the fault creep along the Western Marikina Valley Fault System (Marikina Fault), in the southern part of Metro Manila, Philippines, was started from Sep. 2008. Although the data obtained includes daily fluctuation due to thermal deformation of the metal used to fix equipment, the total movement obtained by this monitoring a...

Aseismic Movement of the Western Valley (Marikina) Fault Kinugasa Yoshihiro1, Deguchi Tomonori2, Kurita Katsumi3, Omura Makoto4, Papiona L. Kathleen1, 5, Rimando E. Rolly5 1 Tokyo Institute of Technology 2 Nittetsu Mining Consultants Co., Ltd. 3 Tokyo Metropolitan Collage of Industrial Technology 4 Kochi Women’s University 5 Philippine Institute...

Fault creep is a unique phenomenon known only along a limited number of major active faults, such as the San Andreas Fault and the North Anatolian Fault. Also, such a phenomenon can be seen in rapidly growing mega cities due to excess withdrawal of underground water. The West Valley Fault, which comprises the western segment of the Marikina Fault,...

Recognition of neotectonic features along the Marikina Valley fault system (MVFS) in central Luzon, Philippines indicates a dominantly dextral strike-slip motion during its most recent activity believed to be Late Pleistocene to Holocene in age. Variations in the ratios of vertical to horizontal displacements for the segments imply a dominantly dex...

We relate families of faults in the Ottawa graben to periods in the tectonic evolution of eastern North America. The Ottawa graben is a seismically active structure that coincides with a 55km wide topographic depression extending from near Montréal through Ottawa. It is part of the St. Lawrence rift system that also includes the seismically active...

The Marikina Fault is an active north-south trending fault in the Metro Manila district and is considered ripe for an earthquake activity in the near future. Buildings and roads had been damaged by vertical displacement along the southern part of the fault's west segment. To monitor the slip rate and elucidate the nature and triggering mechanism o...

Satellite remote sensing provides unique opportunities for regional mapping at a country-wide scale. Here we describe our efforts to assemble a systematic data base of visible, infrared, and topographic data for the Philippines in order to investigate regional structures associated with active volcanoes and active faults. We have obtained ~50 indiv...

The 135-km long Marikina Valley fault system (MVFS) is an active dextral strike-slip fault that transects the eastern part of metro Manila, Luzon Island, Philippines. This study first analyses along-fault, descriptive geomorphic and quantitative-slip data that we gathered to delineate active traces, and infer recency of activity, kinematics and the...

The 16 July 1990 earthquake (Ms = 7.8) produced a 125 km-long ground rupture that stretches from Dingalan, Aurora to Kayapa, Nueva Vlzcaya as a result of strike-slip movements along the NW segment of the Philippine Fault Zone and its splay, the Digdig Fault. The earthquake epicenter was placed at 15º 42' N and 121º 7' E near the town of Rizal, Nuev...

The first 14C-based paleoseismic study of an active fault in the Philippines shows that a right-lateral fault on the northeast edge of metropolitan Manila poses a greater seismic hazard than previously thought. Faulted hillslope colluvium, stream-channel alluvium, and debris-flow deposits exposed in trenches across the northern part of the west Mar...

Department of Science and Technology-Grant-in-Aid (DOST-GIA) Project Terminal Report

DOST-PHIVOLCS Internal Report, 45 pp.

Contemporary reverse faults, marked by offset boreholes, were identified in two roadcuts, and recently formed pop-ups, which are surficial chevron folds, have been recognized in a quarry in the Ottawa-Hull area of Ontario and Quebec, Canada. Displacement directions of the hanging walls, marked by the offset boreholes, are commonly north-northeast t...

The Ottawa-Bonnechere graben forms a 55 km wide topographic low extending from near Montreal through Ottawa. It is part of the St. Lawrence rift system, which also includes the Saguenay graben in Quebec. Cambrian to Ordovician carbonate and fine clastic sedimentary rocks of the St. Lawrence Platform overlie Grenvillian basement rocks and, in the Ot...

The Philippine Earthquake (Ms=7.8) broke out in July 16, 1990 along the Philippine Fault in Central Luzon. The Philippine Fault is seismically very active and large earthquakes of M 7 class have occurred during this century along this fault. However large earthquakes have not taken place along the active traces of the fault in the Central Luzon dur...