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The Mines and Geosciences Bureau (MGB) is a government agency of the Philippines under the Department of Environment and Natural Resources (DENR). The MGB is responsible for the conservation, management, development, and use of the country's mineral resources , including those in reservations and public lands.
The medium girder bridge (MGB) is a lightweight, man-portable bridge that can be assembled without help from heavy equipment. In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including main battle tanks (MBT).
Hazard maps are created and used in conjunction with several natural disasters. [1] Different hazard maps have different uses. For instance, the hazard map created by the Rizal Geological Survey is used by Rizalian insurance agencies in order to properly adjust insurance for people living in hazardous areas. [2]
It is often used within earthquake engineering (including seismic building codes) and it is commonly plotted on seismic hazard maps. [6] In an earthquake, damage to buildings and infrastructure is related more closely to ground motion, of which PGA is a measure, rather than the magnitude of the earthquake itself.
The Seismic Hazards Mapping Act, passed in 1990, addresses non-surface fault rupture earthquake hazards, including liquefaction and seismically induced landslides. The act only applies to faults which are "sufficiently active" and "well defined"- for example the 1994 Northridge earthquake occurred on a blind thrust fault not zoned by the act ...
Seismic microzonation is defined as the process of subdividing a potential seismic or earthquake prone area into zones with respect to some geological and geophysical characteristics of the sites such as ground shaking, liquefaction susceptibility, landslide and rock fall hazard, earthquake-related flooding, so that seismic hazards at different locations within the area can correctly be ...
The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) of 1000 ppm (1800 mg/m 3) over an 8-hour workday and 1250 ppm (2250 mg/m 3) for short-term exposure. At levels of 3400 ppm, 10% of the lower explosive limit, MAPP gas is immediately dangerous to life and health. [9]
Hazard data : this map of the USGS (United States Geological Survey). Additional data (rivers, borders, cities) : Demis compass rose from Compass rose pale.svg (opacified) created by Fibonacci under GFDL ; scale from Image:Scale_kilometres_miles_svg.svg by Sémhur under Public Domain.