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2019 Davao Del Sur Earthquake
At 14:11 PST (06:11 UTC) on December 15, 2019, the province of Davao del Sur on the island of Mindanao in the Philippines was struck by an earthquake measuring 6.8 . It had a maximum perceived intensity of VII (''Very strong'') on the Modified Mercalli Intensity Scale. At least 13 people were killed and another 210 injured. Tectonic setting Mindanao lies across the complex convergent boundary between the Sunda Plate and the Philippine Sea Plate. Part of the oblique convergence between these plates is taken up by subduction along the Cotabato Trench. The strike-slip component of the convergence is accommodated partly by the Philippine Fault System and partly by the Cotabato Fault System, a network of mainly NW-SE trending sinistral (left-lateral) strike-slip faults that form the boundary between the Cotabato Arc and the Central Mindanao Volcanic Belt. In the area of the December 2019 earthquake, the individual faults include the NW-SE trending Makilala–Malungon Fault, Tangbul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippine Standard Time
Philippine Standard Time (PST or PhST; fil, Pamantayang Oras ng Pilipinas), also known as Philippine Time (PHT), is the official name for the time zone used in the Philippines. The country only uses one time zone, at an offset of UTC+08:00, but has used daylight saving time for brief periods in the 20th century. Geographic details Geographically, the Philippines lies and 126°34′ east of the Prime Meridian, and is physically located within the UTC+08:00 time zone. Philippine Standard Time is maintained by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA). The Philippines shares the same time zone with China, Taiwan, Hong Kong, Macau, Malaysia, Singapore, Western Australia, Brunei, Irkutsk, Central Indonesia, and most of Mongolia. History Philippine Standard Time was instituted through Batas Pambansa Blg. 8 (that defined the metric system), approved on December 2, 1978, and implemented on January 1, 1983. The Philippines is one of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matanao
Matanao, officially the Municipality of Matanao ( ceb, Lungsod sa Matanao; tl, Bayan ng Matanao), is a 2nd class municipality in the province of Davao del Sur, Philippines. According to the 2020 census, it has a population of 60,493 people. Matanao is bordered in the west by the town of Columbio, in the province of Sultan Kudarat, in the north by the towns of Magsaysay and Bansalan, in the east by Hagonoy and the city of Digos, and in the south by Kiblawan and Padada. History In June 17, 1957, some of the barrios of the municipality of Bansalan namely Kibao, San Vicente, Kibuaya, Managa Km. 67, Sinawilan, New Visayas, Sacub, Upper Malabang, Tibongbong, Sinaragan, Maliit Digos, Kapok, Tamlangon, Manga, Buas, New Katipunan, Da-Anama, Upper Kauswagan, Kagaulas, Kabasagan, Tuwak, Mal, Latian, Lanturi, Dongan-Pekong, La Union, Kauswagan, and Paitan were grouped and constituted into a new and independent municipality known as Matanao. Matanao means a place or something to see or w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magsaysay, Davao Del Sur
Magsaysay, officially the Municipality of Magsaysay ( ceb, Lungsod sa Magsaysay; tl, Bayan ng Magsaysay), is a 3rd class municipality in the province of Davao del Sur, Philippines. According to the 2020 census, it has a population of 56,263 people. As with much of the rural area of Davao del Sur, the predominant economic activity is based on rice farming. History The whole area under jurisdiction of the municipality of Magsaysay were all once part of Bansalan. It was populated firstly by Bagobos and Manobos until settlers from the Visayas came to the area and eventually became the dominant ethnicity of the area. The most populous village in the area was Kialeg, now the town center, which was renamed Magsaysay in 1959 in honor of the late president Ramon Magsaysay. The municipality of Magsaysay was created from 18 barangays of Bansalan on June 17, 1967 signed by President Ferdinand Marcos. Barangay Magsaysay, formerly and still colloquially known in the present as Kialeg, beca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiblawan
Kiblawan, officially the Municipality of Kiblawan ( ceb, Lungsod sa Kiblawan; tl, Bayan ng Kiblawan), is a 2nd class municipality in the province of Davao del Sur, Philippines. According to the 2020 census, it has a population of 49,381 people. History Kiblawan was established from the barangays Bagumbayan, Paitan, Kiblawan, Kibungbung, Manual, New Sibonga, Maraga-a, Ihan, Bunot, Latian, Balasiao, Apik and Dapok belonging to the municipality of Sulop, via Republic Act No. 4748 signed by President Ferdinand Marcos on June 18, 1966. Geography Climate Barangays Kiblawan is politically subdivided into 30 barangays. Demographics Economy References External links Kiblawan Profile at the DTI Cities and Municipalities Competitive Index* Philippine Standard Geographic Code The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hagonoy, Davao Del Sur
Hagonoy, officially the Municipality of Hagonoy ( ceb, Lungsod sa Hagonoy; tl, Bayan ng Hagonoy), is a 3rd class municipality in the province of Davao del Sur, Philippines. According to the 2020 census, it has a population of 56,919 people. History Before its creation into a municipality, Hagonoy was a sitio of barrio Digos, municipality of Santa Cruz. Then, when the municipality of Padada was created on July 1, 1949, Hagonoy was annexed as one of its barrios. On May 28, 1953, by virtue of Executive Order No. 596 issued by President Elpidio V. Quirino, Hagonoy was separated from Padada and became a regular municipality.Then in early 1970's, batch of Cebuanos came from Danao City, particularly from Caputatan, among them Nathaniel Capuyan and Loselo Capuno Sr., who worked in the sugarcane plantations and settled in barangay Maliit Digos. And from then on plenty of others who came from Caputatan, Danao City followed, and eventually found a place in a land owned by Alejandro Almendra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bansalan
Bansalan, officially the Municipality of Bansalan ( ceb, Lungsod sa Bansalan; tl, Bayan ng Bansalan), is a 1st class municipality in the province of Davao del Sur, Philippines. According to the 2020 census, it has a population of 62,737 people. History Bansalan was a forest primeval and the aborigines were Bagobos. As they were nomadic, they traveled from one place to the other by hacking their way through the virgin forests. They also cultivated land for their staple food but soon left the place after harvest time in search of a better place to cultivate. They also had the wide area of hunting ground where at the end of the day, they brought home speared wild boar, deer or monkeys. The implements they had were crude but obviously the bow and arrow were used both in hunting and fishing. The waters then were crystal pure and were untarnished by the changing current ecology. In some certain sites, Bansalan had patches of cogonal land interspersed with tall trees demarcated by seren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digos
Digos, officially the City of Digos ( ceb, Dakbayan sa Digos; fil, Lungsod ng Digos), is a 2nd class component city and capital of the province of Davao del Sur, Philippines. According to the 2020 census, it has a population of 188,376 people. The city lies on the western shores of the Davao Gulf and southern foothills of Mount Apo on the island of Mindanao, centrally located between the three major cities in Mindanao, Davao City in the north, General Santos City in the south and Cotabato City in the west. It is considered as part of Metro Davao, Metropolitan Davao. It is known for its sweet-juicy 'carabao variety mango,' sold locally and exported abroad, thus being dubbed as the Mango Capital City of the Philippines. It is also considered as The Gate City Of The South. On September 8, 2000, Digos was converted into a city. History In the early days, Digos was a watercourse, a meeting place of inhabitants belonging to the Austronesian people, Austronesians who settled along ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coulomb Stress Transfer
Coulomb stress transfer is a seismic-related geological process of stress changes to surrounding material caused by local discrete deformation events. Using mapped displacements of the Earth's surface during earthquakes, the computed Coulomb stress changes suggest that the stress relieved during an earthquake not only dissipates but can also move up and down fault segments, concentrating and promoting subsequent tremors. Importantly, Coulomb stress changes have been applied to earthquake-forecasting models that have been used to assess potential hazards related to earthquake activity. Coulomb stress change The Coulomb failure criterion requires that the Coulomb stress exceeds a value σf defined by the shear stress τB, normal stress σB, pore pressure p, and coefficient of friction μ of a failure plane, such that It is also often assumed that changes in pore fluid pressure induced by changes in stress are proportional to the normal stress change across the fault plane. These ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2019 Cotabato Earthquakes
The 2019 Cotabato earthquakes were an earthquake swarm which struck the province of Cotabato on the island of Mindanao in the Philippines in October 2019. Three of these earthquakes were above 6.0 on the moment magnitude scale with a Modified Mercalli intensity scale, Mercalli intensity of VIII. More than 40 people have been reported dead or missing and nearly 800 were injured as a result of these events. Tectonic setting Mindanao lies across the complex convergent boundary between the Sunda Plate and the Philippine Sea Plate. Part of the oblique convergence between these plates is taken up by subduction along the Cotabato Trench. The strike-slip component of the convergence is accommodated partly by the Philippine Fault System and partly by the Cotabato Fault System, a network of mainly NW-SE trending sinistral (left-lateral) strike-slip faults that form the boundary between the Cotabato Arc and the Central Mindanao Volcanic Belt. In the area of the October 2019 earthquakes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aftershock
In seismology, an aftershock is a smaller earthquake that follows a larger earthquake, in the same area of the main shock, caused as the displaced crust adjusts to the effects of the main shock. Large earthquakes can have hundreds to thousands of instrumentally detectable aftershocks, which steadily decrease in magnitude and frequency according to a consistent pattern. In some earthquakes the main rupture happens in two or more steps, resulting in multiple main shocks. These are known as doublet earthquakes, and in general can be distinguished from aftershocks in having similar magnitudes and nearly identical seismic waveforms. Distribution of aftershocks Most aftershocks are located over the full area of fault rupture and either occur along the fault plane itself or along other faults within the volume affected by the strain associated with the main shock. Typically, aftershocks are found up to a distance equal to the rupture length away from the fault plane. The pattern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Focal Mechanism
The focal mechanism of an earthquake describes the deformation in the source region that generates the seismic waves. In the case of a fault-related event it refers to the orientation of the fault plane that slipped and the slip vector and is also known as a fault-plane solution. Focal mechanisms are derived from a solution of the moment tensor for the earthquake, which itself is estimated by an analysis of observed seismic waveforms. The focal mechanism can be derived from observing the pattern of "first motions", that is, whether the first arriving P waves break up or down. This method was used before waveforms were recorded and analysed digitally and this method is still used for earthquakes too small for easy moment tensor solution. Focal mechanisms are now mainly derived using semi-automatic analysis of the recorded waveforms. Moment tensor solutions The moment tensor solution is typically displayed graphically using a so-called ''beachball'' diagram. The pattern of en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
