Ghosh noted that it would be difficult to pinpoint an exact number in regard to how much financial damage cities such as Riverside would face. Ghosh stated that many factors would play a part in how significant the financial damage would be, such as the direction in which the earthquake occurs.
What we can do, however, is we can be prepared. During earthquakes everyone should know to drop, cover and hold. It is important to educate those who may not know this. It is also important to have an earthquake kit. We have to be prepared. Sign in. The Elsinore roughly follows the rugged southern mountain front of the Coyote Mountains.
Coyote Mountains Overlook : This unofficially named overlook area is about a mile south of the Carrizo Badlands Overlook on an unpaved track that leads about a quarter mile west to an escarpment over upper Montero Wash Canyon. The overlook provides exceptional views of the northeast end of the Coyote Mountains Figures to The trace of the Elsinore Fault is well exposed along the base of the south-facing mountain front of Coyote Mountains.
This road leads to abandoned mine ruins where high magnesium calcite dolomite marble was mined back in the s. The mines are located along the southern mountain front in the vicinity of the Elsinore Fault Zone. The fault zone is associated with a major Mw7.
Amazingly, no fatalities were reported. Displacement of both Holocene and Quaternary alluvium and fan deposits. Topo map Geologic map: western part: Todd ; eastern part: Rogers The landscape is dry, barren country with low rocky tablelands and badlands cut by alluvial washes and some dune areas.
The bedrock consists of Pliocene-age continental and fossiliferous shallow marine sedimentary formations. Juan Bautista de Anza National Historic Trail: This remote unpaved loop road has both historical and geological significance Figures to During each tortuous passage, the Spanish camped below here in Yuha Wash.
The Passage in , which explored and pioneered the first overland route into Upper California, consisted of only a small group of soldiers and two missionaries, Fathers Carces and Diaz.
A second trip in brought settlers to the coast of California. Spain felt that its tenuous hod on the New World was threatened by Russian settlements to the north. The Spanish missions were struggling to survive and needed a reliable supply route to ensure military, political and religious success. Feature locations map Fig. Urban areas Fig. Land Use Map Fig.
National Geographic Fig. Index map earthquakes with study area location boxes. Satellite map with Quaternary faults shown. Geologic Map with study area boxes Fig. Geologic maps and earthquake faults legend. Butterfield Ranch Elementary School with fault scarp of a strand of the Chino Fault behind building and north end of the parking lot. A side-hill bench runs along the mountain front about half-way up the mountainside.
The fault zone cuts through a canyon gap across northeast end of Santa Ana Mountains and continues south along the mountain front. No easy parking at this location. The stream channel follows the fault line. View looking south along the fault zone straight canyon of Wardlow Wash from Palisades Avenue Bridge. Chino Fault zone in green space area along Serfas Club Drive. This view is on the north side of the road.
Skyline Drive Trail starts on Foothill Parkway. Eroded vertical fractures in the fault zone. Fractured sandstone in cliffs along Hagador Creek. Side-hill bench along fault zone in Hagador Canyon. Grassy field on the alluvial fan in Hagador Canyon west of the fault zone and the ridgeline of the northern Santa Ana Mountains. The well maintained Skyline Drive Trail. Geologic map. Historic aerial photograph, caption states: "High altitude view from approximately 16, feet , toward the southeast along part of the Elsinore fault zone from Corona and the Santa Ana Mountain fore-ground , across Lake Elsinore middle ground to Agua Tibia Mountain background.
Sub-parallel roads in the foreground contour the form of the Corona alluvial fan. Frampton, View looking northwest along the shore with a shutter ridge on the right. The restored Lake Elsinore Railroad Station is now a visitor center.
Swales along the Wildomar Fault near historic downtown Lake Elsinore. Zoom view of Lake Elsinore. Wildomar Fault escarpment on Palomar St. Chaney Hill is an uplifted block of early Quaternary sedimentary rocks. Elsinore Peak consists of a remnant of Miocene-age basalt resting on top of an ancient erosion surface.
Outcrop of the fine-grained Quaternary basin fill deposits Pauba Formation north of Murietta. Santa Rosa Plateau mountain front along De Luz Road near where pavement ends at a trailhead parking area. The mountain front in this area is cut by multiple strands of the Willard Fault on the western side of the Elsinore Trough.
Heavily fractured basalt along De Luz Road in the vicinity of the fault zone. Santa Rosa basalt in upper canyon along De Luz Road west of the fault zone. Parking area for Temecula valley overlook on Rancho California Road. View of the mountain front north of the Temecula Valley overlook. Zoom view of the mountain front south of the Temecula Valley overlook. The Willard Fault splits into parallel and interconnected fault strands along the mountain front west of Temecula, CA.
Wildomar Fault crosses I with scarp. Temecula Duck Pond Park. Prior to development the pond was a natural sag pond area along Temecula Creek. Panoramic view looking south-west-north left to right from a hilltop overlooking the Wildomar Fault zone from a hilltop overlooking fields next to Temecula Duck Pond Park.
Stream drainages appear to be deflected along fault zone that runs parallel to Ynez Drive to the southeast of the Duck Pond area. Panoramic view looking east to south from the top of a side-hill bench on the north side of the mouth of Temecula Canyon. The Willard Fault cuts across the canyon and then runs the mountain front near the break in slope south of the canyon.
Santa Margarita River starts at the confluence at the mouth of Temecula Canyon. The river drains to the coast on Camp Pendleton.
View upstream at the mouth of Temecula Canyon. Granite boulders in river in the foreground. Foliated schist with granitic dikes in Temecula Canyon exposed along the river bed.
USGS stream gaging station cement dam and antenna box at mouth of canyon. A strand of the Willard Fault cuts across the golf course.
Temescal Canyon is on the other side of I Zoom view of the granite boulders and outcrops on Pueska Mountain on the west side of I The Julian section of the fault cuts across the mountain front.
Nate Harrison Grade at Highway 77 climbs the alluvial fan to the faulted mountain front. View from the Nate Harrison Grade of the side-hill bench next to the fault cutting across the mountain front. A notch on the distant slope is a side-hill bench and fault scarp north of the Nate Harrison Grade. Panoramic view looking south from near where the fault crosses the the unpaved part of Nate Harrison Grade.
Index map that shows the extent of the Witch Fire that burned a large region west of the fault zone. This panoramic view is from a pull off on southbound CA 79 at the pass between Rincon and the turnoff to the South Grade Road to Palomar Mountain shown here The Elsinore Fault runs across the mountain front, basically following a series of scarps, side-hill benches. The fault trace basically follows the boundary shown as change in vegetation lower is chaparral and upper is mostly pine forest.
View looking south from the CA 79 pass pull off toward the fault trace crossing the mountain front along Palomar Mountain and Eagle Crage Mountain. Zoom view of the mountain front of Palomar Mountain from CA 79 pass pull off where a vegetation change roughly marks the trace of the Elsinore Fault.
Panoramic view to the south and east from the pull off on the switchbacks along South Grade Road. Pull off on the uphill side of South Grade Road in the vicinity of where the Elsinore Fault crosses the road be cautious of traffic! Alluvial gravel deposits unconformably cap deeply fractured and weathered granite along South Grade Road.
A fault strand offsets alluvial gravel deposits next to deeply weathered and fractured bedrock exposed along South Grade Road. Switchback on South Grade Road are in foreground. View looking south from a pull off along Highway 76 La Jolla Reservation showing a fault-related bench on the mountain front in the distance.
Zoom view south at La Jolla Reservation pull off that shows side-hill benches where the Elsinore Fault crosses over spurs on the mountain front. Legend showing the age and description of geologic units shown on the geologic map of the Julian 7. Portion of the Julian , topographic map that shows more detail of landscape features in the Julian and Cuyamaca and Volcan Mountains area.
The fault scarp runs along the south side of the stream drainage. The stream drainage shown here is deflected along the fault zone. Banner Canyon view from Volcan Mountain summit. View to northeast from pull off along Highway 78 in Banner Canyon.
The Elsinore Fault runs along the lower slope near the stream in the upper part of the canyon. Zoom view looking up Banner Canyon toward the divide near the Volcan Mountain Trailhead area where the Elsinore Fault crosses into into the canyon.
Elsinore Fault exposed along a side-hill bench in the lower wall of upper Banner Canyon in the area west upstream of the Banner Recreation Ranch. View looking down Banner Canyon to where the Elsinore fault crosses a bend in the valley and continues up a side canyon. Historic topo maps. Box Canyon falls area along Highway S2 is a famous location of the Butterfield stage route.
Parking area for Mason Valley Cactus area looking down from top of scarp in southeast part of the Julian section. View southeast along Ghost Mountain front with fault scarp and deflected drainage near parking area in Mason Valley Cactus Gardens.
View looking north along fault area to small shutter ridge on right. Rodriguez Canyon with fault zone is in the distant left. Topo map. Map strands of the fault follow the mountain front. Vegetation grows along the seeps and springs in the vicinity of the fault zone in lower Moonlight Canyon. View looking south at the sheared and altered granitic bedrock along lower Moonlight Canyon.
Fault scarp with bench cutting across alluvial fan midway between Agua Caliente County Park and Canebrake Canyon area. View of the mountain front at Canebrake Canyon from Highway S2. South is to the left, north is to the right. Historic aerial photograph along the Coyote Mountain section. Caption states: "View southeastward toward Coyote Mountains, left middle ground, and the Elsinore Fault zone marked by the prominent trough at the base of the mountains.
The high peak on the left skyline is Signal Mountain, located just south of the international border. Photo by F. Jarold Weber, Jr. View of a fault scarp cutting across alluvial fans along the base of the Terra Blanca Mountains. View looking north at the mountain front with low fault scarps on the alluvial fans north of Palm Canyon. The fault runs along the mountain front of the Terra Blanca Mountains in the vicinity of Palm Canyon.
Desert palms grow along seeps in the canyon west of the fault zone in Palm Canyon. Sign showing the entrance to the access road to the Bow Willow Creek Campground area. Closer view of the uplifted block of alluvial sediments and fresh fault scarp along Bow Willow Creek.
A closer view that shows how fault activity has impacted deposition of alluvial sediments beds over time. Zoom view of the mouth of Canyon Sin Nombre where is crosses the Coyote section of the fault zone. No shooting or fires sign shows location of the Carrizo Badlands Overlook unpaved access road.
View from the Carrizo Badlands Overlook area along Highway S2 showing the faulted dark mountain front at the north end of the Coyote Mountains to the right of center. The badlands are north of Canyon Sin Nombre.
View looking north from the unofficial Coyote Mountains overlook area south of Carrizo Badlands Overlook. View of badlands below the Coyote Mountain front from the unofficial overlook area. View to the south along the Coyote Mountains mountain front along Montero Wash. Zoom view from the Coyote Mountains overlook of the dolomite mine in the Elsinore fault zone.
This view is from an unnamed Coyote Mountains overlook area on an unpaved road about a mile south of the Carrizo Badlands Overlook area. The Elsinore Fault runs basically along the base of the south-facing mountain front. A kiosk at the Domelands Trailhead turnoff describes local paleontology of the Coyote Mountains area.
Elsinore Fault stands out as a bedrock contrast along the mountain front south of Domelands area. Shell Road leads to the Fossil Canyon area. Elsinore Fault runs along the southwestern front of the Coyote Mountains. View from Montero Wash. Nearly flat-lying Plio-Pleistocene sedimentary deposits are faulted adjacent to Mesozoic-age igneous and metamorphic rocks. A closer view of the vertical fresh fault scarp cutting across the the mountain front at Fossil Canyon.
Displacement along Elsinore Fault: granitic basement adjacent to Quaternary alluvial beds. White veins of gypsum filling fractures in fanglomerate near fault in Fossil Creek wash.
Pliocene age fossils clam hash exposed in sedimentary deposits in Fossil Canyon. Panoramic view of looking south toward the mouth of Ocotillo Canyon. Igneous gneiss and schist is on the left and flat to steeply dipping Pliocene sedimentary rocks are on the right side of the canyon. The two rock lithologies are exposed in an uplifted horst block along the Coyote Mountains section of the Elsinore Fault Zone. Another persecutive view of the rocks exposed at the mouth of Ocotillo Canyon.
Granite and schist on the left, fanglomerate on the right. Sheared basement rock Triassic? Historic marker for the Juan Bautista de Anza erected to commemorate the historic expedition of View looking north at the southern end of the Coyote Mountains from near the historic marker.. View looking north from the marker area. Dark surface gravel overlies steeply dipping Pliocene beds east of the historic marker. View looking south along the escarpment of westward-dipping strata south of the historic marker.
Swales in the road to the Crucification Thorn Area reveal locations of fault strands of the Laguna Salada section. Surface rupture from the earthquake on the Laguna Salada Fault section Rymer, View east of Sunrise Butte toward the Crucification Thorn area that shows swales in Highway 98 associated with fault strands.
The notch in the slope below the summit is mapped as a fault line as part of the Laguna Salada Fault section. Steeply dipping Pliocene-age coastal and shallow marine strata on east side of Sunset Butte in Yuha Basin region. Elsinore Fault Zone. This website is intended for educational exploration of the landscape features associated with the Elsinore Fault. On any given day the Index Map of Recent Earthquakes in California-Nevada shows dozens of earthquake in the region, almost all are magnitude 2 or less, which can hardly be felt in most cases.
However, the pattern of earthquakes reveal activity along the major earthquake faults in southern California. By comparison, the Elsinore Fault is not as active as the nearby San Jacinto and San Andreas faults, but never-the-less it does show earthquake activity, and it has potential for producing major earthquakes. Southern California's fault system. The fault zone consists of a series of parallel and interconnected splay faults that extend in a northwest direction across the Peninsular Ranges of Southern California.
Each section is discussed below. Laguna Salada Fault is a southern extension of the Elsinore Fault Zone that extends south 38 miles 61 km into northern Baja California. Map showing the seven named segments or sections of the Elsinore Fault Zone.
The fault zone extends southward from the Los Angeles Basin area. It follows a northwest-to-south east trend, mostly through mountainous country of the SoCal Peninsular Ranges. Earthquake History and Information It was the Great San Francisco Earthquake of that brought the study of California earthquake faults to the world's attention. The fault zone was known before then as oil was discovered and produces along the Whittier Fault section starting in the s.
By comparison to other fault in the region, the Elsinore Fault gives the impression of being a relatively quiet fault in historic times. The first known significant earthquake attributed to the Elsinore Fault in historic times occurred on 15 May, , reported as a Magnitude 6 earthquake near Temescal Valley. One of California's strongest historic earthquakes with an estimated magnitude 7.
This earthquake has has been attributed to the Laguna Salada section of the Elsinore Fault that extends south across the Mexico border Hough and Elliot, Likewise, the 4 February, Baja California earthquake magnitude 7. Other than a comparatively minor magnitude 5. However, seismological data released by the Southern California Earthquake Data Center SCEDC, suggests: The probable magnitude of a major earthquake along the Elsinore fault zone could be in the range of magnitude 6. The estimates slip rate for the fault is reported as roughly 4.
The probable recurrence interval between major ruptures along the fault zone is roughly estimated between and years. These estimates vary from studies along different fault strands and location along the fault zone. The most recent surface rupture in the northern and central sections occur in the 18th century, surface rupture occur at the southern end in The recurrence interval given above suggests slip of 1.
Figures 4 to 7 are a variety of reference maps that show the location of earthquake faults relative to landscape features including mountains, lakes, rivers, and streams, roads and urban area, and land use areas national forest, parks, reservations, etc.
Figure 8 shows the index maps along the Elsinore Fault Zone overlain on a satellite map of Southern California that shows the location of faults and earthquakes epicenters recorded in the region from to Sleeter, Calzia, and Walter, The location of earthquake epicenters in relation to faults reveal the possible dip angle of fault planes below the surface. The fault dip direction for different fault strands varies significantly from nearly vertical to southwest to northeast dip direction.
A near-vertical to steep NE dip is indicated by seismicity to about 8 miles 13 km depth Hull and Nicholson, Figures 9 is a satellite image map with Quaternary to recent faults shown. Figure 10 is a generalized geologic map with map index boxes and faults shown. More detailed geologic maps are presented below for each index box.
Figure 11 is a legend for the geologic map and the Quaternary faults shown on the all the maps below. Location map for "study areas" along the Elsinore Fault Zone encompassing the seven named sections along the fault zone. The boxes on the map are an index map to study areas presented below. Flames roared across three-quarters of a million acres in fivecounties, killing 24 people, injuring others and torching 3,homes.
Southwest County communities lie directly downwind from theplant. But the plant is apotential target for terrorists and if it were to be breached, hesaid, it would take only a short time for toxic material to driftacross Camp Pendleton and the Santa Rosa Plateau into Murrieta andTemecula. It would take just five to 10 minutesfor a wall of escaping water to reach those communities, the countyplan estimates.
However, as the January flood indicated, a dam would nothave to break to trigger a flood. With several major truck routes traversing the county, amongthem Interstates 15 and , and Highways 60 and 91, there is alsoa constant threat of a hazardous material spill. Such an accidentcould not only take lives and injure people, it could tie uptraffic for hours. Contact staff writer Dave Downey at , Ext.
Real Estate News. Hot Property. About Us. Community papers. Games, Puzzles, and Crossword. Just because a large earthquake has not happened historically does not mean a damaging event could not occur.
Such an event would be devastating for the region and could cause damage from San Diego to Los Angeles. This model uses global strain rates and the last 40 years of seismicity to estimate the likely earthquake magnitude in your lifetime anywhere on earth. While such an event would not have as large an impact on all of Southern California, it could be devastating to places like Riverside and Mission Viejo. Skip to content. Also highlighted in this map are the three major faults in Southern California.
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