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Petrolia, California
Petrolia is an unincorporated community in Humboldt County, California, northeast of Cape Mendocino, at an elevation of above sea level, within ZIP Code 95558, and area code 707. Petrolia was the site of the first oil well drilled in California. Description Petrolia has an estimated population of 300-500 people within a 15-mile radius. It is located in the Mattole Valley, part of the Lost Coast region, one of the largest wilderness areas and the longest stretch of undeveloped coastline in the continental United States. Petrolia's isolation is due to its position on the rocky, treacherous coastline adjacent to the King Range mountains that isolate this area from mainland California and continue to leave the area almost completely undeveloped. A travel magazine has called this area "too lovely to be believed, perhaps too beautiful to last." It has been recognized as the top "still wild" place in California. The area is the only significant stretch of California without a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unincorporated Area
An unincorporated area is a region that is not governed by a local municipal corporation. Widespread unincorporated communities and areas are a distinguishing feature of the United States and Canada. Most other countries of the world either have no unincorporated areas at all or these are very rare: typically remote, outlying, sparsely populated or List of uninhabited regions, uninhabited areas. By country Argentina In Argentina, the provinces of Chubut Province, Chubut, Córdoba Province (Argentina), Córdoba, Entre Ríos Province, Entre Ríos, Formosa Province, Formosa, Neuquén Province, Neuquén, Río Negro Province, Río Negro, San Luis Province, San Luis, Santa Cruz Province, Argentina, Santa Cruz, Santiago del Estero Province, Santiago del Estero, Tierra del Fuego Province, Argentina, Tierra del Fuego, and Tucumán Province, Tucumán have areas that are outside any municipality or commune. Australia Unlike many other countries, Australia has only local government in Aus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porcupine
Porcupines are large rodents with coats of sharp spines, or quills, that protect them against predation. The term covers two families of animals: the Old World porcupines of family Hystricidae, and the New World porcupines of family, Erethizontidae. Both families belong to the infraorder Hystricognathi within the profoundly diverse order Rodentia and display superficially similar coats of rigid or semi-rigid quills, which are modified hairs composed of keratin. Despite this, the two groups are distinct from one another and are not closely related to each other within the Hystricognathi. The largest species of porcupine is the third-largest living rodent in the world, after the capybara and beaver. The Old World porcupines (Hystricidae) live in Italy, Asia (western and southern), and most of Africa. They are large, terrestrial, and strictly nocturnal. The New World porcupines (Erethizontidae) are indigenous to North America and northern South America. They live in wooded area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1992 Cape Mendocino Earthquakes
The 1992 Cape Mendocino earthquakes (or 1992 Petrolia earthquakes) occurred along the Lost Coast of Northern California on April 25 and 26. The three largest events were the M7.2 Fault (geology)#Dip-slip faults, thrust mainshock that struck near the unincorporated community of Petrolia, California, Petrolia midday on April 25 and two primary Fault (geology)#Strike-slip faults, strike-slip aftershocks measuring 6.5 and 6.6 that followed early the next morning. The sequence encompassed both interplate earthquake, interplate and intraplate earthquake, intraplate activity that was associated with the Mendocino Triple Junction, a complex system of three major faults (including the Cascadia subduction zone, San Andreas Fault, and Mendocino Fracture Zone) that converge near Cape Mendocino. The total number of aftershocks that followed the events exceeded 2,000. The three shocks damaged and destroyed homes and businesses in Humboldt County, California, Humboldt County and injured up to 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moment Magnitude Scale
The moment magnitude scale (MMS; denoted explicitly with or Mw, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. It was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude scale, local magnitude/Richter scale () defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often says "Richter scale" when referring to the moment magnitude scale. Moment magnitude () is considered the authoritative magnitude scale for ranking earthquakes by size. It is more directly related to the energy of an earthquake than other scales, and does not saturate—that is, it does not underestimate magnitudes as other scales do in certain conditions. It has become the standard scale used by seismological authorities like the U.S. Geological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mendocino Triple Junction
The Mendocino Triple Junction (MTJ) is the point where the Gorda plate, the North American plate, and the Pacific plate meet, in the Pacific Ocean near Cape Mendocino in northern California. This triple junction is the location of a change in the broad plate motions which dominate the west coast of North America, linking convergence of the northern Cascadia subduction zone and translation of the southern San Andreas Fault system. The Gorda plate is subducting, towards N50ºE, under the North American plate at 2.5 – 3 cm/yr, and is simultaneously converging obliquely against the Pacific plate at a rate of 5 cm/yr in the direction N115ºE. The accommodation of this plate configuration results in a transform boundary along the Mendocino Fracture Zone, and a divergent boundary at the Gorda Ridge. Due to the relative plate motions, the triple junction has been migrating northwards for the past 25–30 million years, and assuming rigid plates, the geometry requires that a vo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas Fir
The Douglas fir (''Pseudotsuga menziesii'') is an evergreen conifer species in the pine family, Pinaceae. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Oregon pine, and Columbian pine. There are three varieties: coast Douglas-fir (''P. menziesii'' var. ''menziesii''), Rocky Mountain Douglas-fir (''P. menziesii'' var. ''glauca'') and Mexican Douglas-fir (''P. menziesii'' var. ''lindleyana''). Despite its common names, it is not a true fir (genus ''Abies''), spruce (genus '' Picea''), or pine (genus ''Pinus''). It is also not a hemlock; the genus name ''Pseudotsuga'' means "false hemlock". Description Douglas-firs are medium-size to extremely large evergreen trees, tall (although only ''Pseudotsuga menziesii var. menziesii'', common name coast Douglas-firs, reach heights near 100 m) and commonly reach in diameter, although trees with diameters of almost exist. The largest coast Douglas-firs regularly live over 500 years, with the old ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salmon
Salmon () is the common name for several list of commercially important fish species, commercially important species of euryhaline ray-finned fish from the family (biology), family Salmonidae, which are native to tributary, tributaries of the North Atlantic (genus ''Salmo'') and North Pacific (genus ''Oncorhynchus'') basin. Other closely related fish in the same family include trout, Salvelinus, char, Thymallus, grayling, Freshwater whitefish, whitefish, lenok and Hucho, taimen. Salmon are typically fish migration, anadromous: they hatch in the gravel stream bed, beds of shallow fresh water streams, migrate to the ocean as adults and live like sea fish, then return to fresh water to reproduce. However, populations of several species are restricted to fresh water throughout their lives. Folklore has it that the fish return to the exact spot where they hatched to spawn (biology), spawn, and tracking studies have shown this to be mostly true. A portion of a returning salmon run ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steelhead Trout
Steelhead, or occasionally steelhead trout, is the common name of the anadromous form of the coastal rainbow trout or redband trout (O. m. gairdneri). Steelhead are native to cold-water tributaries of the Pacific basin in Northeast Asia and North America. Like other sea-run (anadromous) trout and salmon, steelhead spawn in freshwater, smolts migrate to the ocean to forage for several years and adults return to their natal streams to spawn. Steelhead are iteroparous, although survival is approximately 10–20%. Description The freshwater form of the steelhead is the rainbow trout (''Oncorhynchus mykiss''). The difference between these forms of the species is that steelhead migrate to the ocean and return to freshwater tributaries to spawn, whereas non-anadromous rainbow trout do not leave freshwater. Steelhead are also larger and less colorful than rainbow trout, and can weigh up to and reach in length. They can live up to 11 years and spawn multiple times. The body of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Punta Gorda Light
Punta Gorda Lighthouse is a lighthouse in the United States, south of Cape Mendocino, California, within Humboldt County. Access is via a short hike from the end of a 4WD road. It is managed by the Bureau of Land Management. History Punta Gorda Lighthouse was built in 1911 and was first lit in 1912. After World War II, it was decided that given the remoteness of the station it was too costly to maintain. A lighted buoy was placed offshore, the fourth order Fresnel lens was removed, and the station was boarded up and deactivated in 1951. The keeper's house and all other station buildings were eventually demolished except the reinforced concrete light station building and the metal framework for the lantern room atop it and the reinforced concrete oil house were left standing. Historical Information from USCG web site: Punta Gorda originally consisted of upon which were situated three dwellings, a small two-story concrete lighthouse, concrete oil house, a wooden fog signal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
King Range National Conservation Area
The King Range is a mountain range of the Outer Northern California Coast Ranges System, located entirely within Humboldt County on the North Coast of California. Geography Much of the mountain range's area is protected within the King Range National Conservation Area, a National Conservation Area unit of the National Landscape Conservation System, and in the King Range Wilderness Area, both managed by the Bureau of Land Management (BLM). As part of the Northern Coast Ranges, the King Range runs parallel to the coast, and its western slopes fall steeply to the Pacific Ocean. The King Range is adjacent to the Mendocino Triple Junction, where three tectonic plates — the Pacific Plate, the North American Plate, and the Juan de Fuca Plate — meet. The area experiences frequent earthquakes. Most mountains and ridges in the range are low to moderate in elevation. King Peak, at , is the highest mountain in the range. Snow falls above 3,281 feet (1,000 m) a couple of times per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bald Eagle
The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche as the bald eagle in the Palearctic. Its range includes most of Canada and Alaska, all of the contiguous United States, and northern Mexico. It is found near large bodies of open water with an abundant food supply and old-growth trees for nesting. The bald eagle is an opportunistic feeder which subsists mainly on fish, which it swoops down upon and snatches from the water with its talons. It builds the largest nest of any North American bird and the largest tree nests ever recorded for any animal species, up to deep, wide, and in weight. Sexual maturity is attained at the age of four to five years. Bald eagles are not actually bald; the name derives from an older meaning of the word, "white headed". The adult is mainly brown with a white ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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