Daily Archives: January 27, 2018

Watch “𝐖𝐚𝐭𝐜𝐡 𝐓𝐡𝐞 𝐁𝐢𝐫𝐝𝐬 𝐖𝐚𝐭𝐜𝐡 𝐌𝐨𝐯𝐢𝐞𝐬 𝐎𝐧𝐥𝐢𝐧𝐞 𝐅𝐫𝐞𝐞” on YouTube (several posters for the movie)


From Wikipedia: Whittier Narrows


https://en.wikipedia.org/wiki/Whittier_Narrows?wprov=sfla1

The Whittier Narrows is awater gap between the Puente Hills to the east and the Montebello Hills to the west.The gap is located at the southern boundary of the San Gabriel Valley, through which the Rio Hondo and the San Gabriel River flow through to enter the Los Angeles Basin. The gap is also traversed by both Interstate 605 andCalifornia State Route 19.

Quick facts: Elevation, Traversed by …

Whittier Narrows

Aerial view of Whittier Narrows Dam from downstream looking upstream through the gap.

Elevation 183 ft (56 m)
Traversed by I-605, SR 19
Location North of Whittier, California
Range Puente Hills / Montebello Hills
Coordinates 34°01′45″N118°02′58″W

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History

The first European land exploration of Alta California, the Spanish Portolá expedition, discovered Whittier Narrows on its return journey to San Diego. On the outbound journey, the party had followed San Jose Creek, reaching the San Gabriel River north of the Narrows.Franciscan missionary Juan Crespi noted in his diary, “We started out in the morning through the gap of the valley of San Miguel [now San Gabriel], which is very full of trees. We traveled a long while to the southwest on the edge of the stream, which, rising from a copious spring of water in the same gap, merits now the name of river; its plain is covered with willows and some slender cotton woods.”

Whittier Narrows was the meeting point for boundary corners of several land-grantranchos, created during the Spanish-Mexican era, including the Rancho Paso de Bartolo.

On 1 October 1987 at 7:42 a.m. PDT, the 5.9 Mw Whittier Narrows earthquake affected the Greater Los Angeles Areawith a maximum Mercalli intensity of VIII (Severe).

Whittier Narrows Recreation Area

View north of the Whittier Narrows Dam

The Whittier Narrows Recreation Area is a large multi-use facility, headquartered in South El Monte, containing North Lake, Center Lake, and Legg Lake (where radio-controlled model speedboats may be operated), a rifle and pistol shooting range, numerous softball and soccer fields with picnic tables, a paved airstrip for radio-controlled hobby aircraft, and a connector trail between the Class I Rio Hondo bicycle path and the San Gabriel River bicycle path. The park is roughly bordered by Garvey Avenue and San Gabriel Blvd to the north and west and Durfee Avenue and Santa Anita/Merced Avenues to the south and east. A convenient point of access is the Rosemead Blvd (State Route 19) exit south from thePomona (60) Freeway.

Within the Recreation Area is the Whittier Narrows Nature Center, which contains exhibits about the plants and animals of the river environment, including live displays. The center offers public programs, lectures, ranger tours and education programs. In October 2008, a proposed new interpretive center drew controversy over the potential destruction of a large amount of existing wildlife habitat.

Whittier Narrows Dam

Main article: Whittier Narrows Dam

The Whittier Narrows Dam is a flood control and water conservation project constructed and operated by the U.S. Army Corps of Engineers, Los Angeles District. It collects runoff from the uncontrolled drainage areas upstream along with releases from the Santa Fe Dam, and can redirect flows into the Rio Hondo or the downstream San Gabriel. It was completed in 1957.

See also

References

More information: Tap to expand …

From Wikipedia: 1987 Whittier Narrows earthquake


https://en.wikipedia.org/wiki/1987_Whittier_Narrows_earthquake?wprov=sfla1

The 1987 Whittier Narrows earthquake occurred in the southern San Gabriel Valleyand surrounding communities of southern California at 7:42 a.m. PDT on October 1. The moderate 5.9 magnitude blind thrust earthquake was centered several miles north of Whittier in the town ofRosemead, had a relatively shallow depth, and was felt throughout southern California and southern Nevada. A large number of homes and businesses were impacted, along with roadway disruptions, mainly in Los Angeles and Orange counties. Damage estimates ranged from $213–358 million, with 200 injuries, three directly-related deaths, and five additional fatalities that were associated with the event.

Quick facts: Date, Origin time …

1987 Whittier Narrows earthquake

Las Vegas

Los Angeles

San Luis Obispo

San Diego

Las Vegas

Date 1 October 1987
Origin time 14:42 (UTC)
Magnitude 5.9 Mw
Depth 14 km (8.7 mi)
Epicenter 34.06°N 118.08°W
Type Blind thrust
Areas affected Greater Los Angeles Area
Southern California
United States
Total damage $213–358 million
Max. intensity VIII (Severe)
Peak acceleration .63g at 7215 Bright Ave., Whittier
Aftershocks 5.2 Mw October 4 at 10:59 UTC
Casualties 8 dead
200 injured

Mercalli intensity values for the greater Los Angeles area varied with ranges from VI (Strong) to VII (Very strong). Only Whittier experienced a level of VIII (Severe), the highest experienced during the event, with the historic uptown area suffering the greatest damage. A separate M5.2 strike-slip event occurred three days later and several kilometers to the northwest that also caused damage and one additional death. Because of the earthquake activity in the Los Angeles Metropolitan area, buildings and other public structures had been equipped with accelerometers, and both the mainshock and the primary aftershock provided additional data for seismologists to analyze and compare with other southern California events.

Tectonic setting

See also: Fold and thrust belt, Los Angeles Basin, and Southern California faults

Beginning with the 1983 Coalinga earthquake, a blind thrust event in the centralcoast ranges of California, a change in perspective was brought about regarding these types of (concealed) faults. The October 1987 shock occurred on a previously unrecognized blind thrust fault that is now known as thePuente Hills thrust system. The fault was delineated by the mainshock and aftershockfocal mechanisms, fault plane reflection studies, and high resolution seismic profiles, which also revealed that the fault runs from downtown Los Angeles to near Puente Hills. The system is considered one of the highest-risk faults in the United States due to its moderate dip and its location under a large metropolitan area.

Earthquake

See also: List of earthquakes in California

The main shock occurred near the northwestern border of thePuente Hills 3 kilometers (1.9 mi) north of the Whittier Narrows at a depth of 14 kilometers (8.7 mi). First motion polarities, along with modelling of teleseismic Pand S-waves, established that the thrust fault responsible for the shock strikes east-west with a dip of 25° dip to the north. The shock was located adjacent to the west-northwest striking Whittier fault, which is primarily a strike-slip fault, but also has a minor thrust component.

USGS ShakeMap for the Whittier Narrows mainshock

Although most of the Los Angeles metropolitan areasaw shaking in line with Mercalli Intensity values of VI (Strong) or VII (Very strong), Whittier experienced effects consistent with MMI values of VIII (Severe). The old commercial district saw the worst damage, as these were the oldest buildings, and were also heavily damaged in the 1929 Whittier earthquake, a shock may have been a result of movement on the Norwalk Fault.

Damage

The 7:42 a.m. shock was the strongest in the Los Angeles area since the 1971 San Fernando earthquake and was felt as far as San Diego and San Luis Obispo, California and Las Vegas, Nevada. Communication systems and local media were temporarily impaired and power was cut, leaving numerous early morning workers stranded in disabled elevators. Other minor disruptions included a number of water and gas main breaks, shattered windows and some ceiling collapses. Like the San Fernando earthquake, transportation systems were again affected, but this time it was only theSanta Ana Freeway and San Gabriel River Freeways that were closed near Santa Fe Springs after pieces of concrete were dislodged and cracks were observed in the roadway. Los Angeles County+USC Medical Centertook a large number of the injured, whose injuries were summarized by an emergency room spokesman as very bad to minor, and three people died as a direct result.

While total casualties amounted to eight, the destruction of homes was significant. Throughout Los Angeles, Orange, and Venturacounties, 123 homes and 1,347 apartments were destroyed, and an additional 513 homes and 2,040 apartments were damaged. An inspection of a highway bridge on Interstate 605revealed that there were fractures on the support columns, which resulted in a temporary closure, and minor damage affected 28 other bridges. Other typical failures included more than 1,000 gas leaks, with many resulting in fire, ceramic elements on high-voltage substation equipment breaking, and phone systems becoming overwhelmed.

Strong motion

Caltech scientists recorded the events on a cluster of twelve strong motion sensors that were placed throughout the region with a total of 87 channels of recorded data. Nine of these instruments were located on the Caltech campus, two were at the nine story Jet Propulsion Laboratory building 180 (ten miles northwest of the campus) and the final device was placed on a hillside 5 km to the west. Investigation of the accelerograms from these units revealed the strongest shaking lasted 4–5 seconds. The vertical accelerations were considered relatively high and early analysis (pre-digitilization) indicated that the mainshock was complex, with a double train of P-waves arriving with a 1.4–1.8 second interval.

The National Strong-Motion Instrumentation Network (NSMIN) (a cooperative effort including the United States Geological Survey and other organizations) also monitored a set of 52 strong motion stations in the Los Angeles area. Most of the stations successfully captured the event, and the closest unit to the mainshock, a rock site at Garvey Reservoir, recorded a peak horizontal acceleration of .47g. A twelve-story steel frame building in Alhambrawas outfitted with accelerographs in the basement, at mid-level, and at the top of the structure. The top floor instruments recorded a peak acceleration of .18gduring the 1971 San Fernando earthquake and instruments on the sixth floor recorded a peak acceleration of .47g at the time of the Whittier mainshock. A ten-story reinforced concrete building in Whittier (7215 Bright Ave.) saw a peak horizontal reading of .63g in the basement.

Aftershocks

A magnitude 5.2 event occurred three days later on October 4, causing additional damage in Alhambra, Pico Rivera, Los Angeles, and Whittier. The shock’s effects were assessed at VII (Very strong) on the Mercalli Intensity Scale with damaged chimneys, broken windows, and the collapse of two bell towers at the San Gabriel Civic Auditorium. This event was also responsible for several injuries and one additional death. On February 11 of the following year another small aftershock again damaged chimneys, broke windows, cracked drywall and some homes’ foundations in Pico Rivera, Pasadena, and Whittier.

The October 4 aftershock struck 3 kilometers (1.9 mi) to the northwest of the mainshock, and was primarily a strike-slip event on a steeply dipping, northwest-striking fault. The origin of faulting for this event was at a depth of12 km (7.5 mi), which places it within the hanging wall of the thrust fault that was responsible for the main shock.

This aftershock was recorded on thirty of the NSMIN stations at distances of up to57 kilometers (35 mi). The majority of the stations were located in buildings, but nine were located at dams or reservoirs, and four were atVeterans Administrationbuildings. Lighter accelerations were observed than the main shock, with peak accelerations in the range of .15g–.33g, all occurring at six stations that were within 12 kilometers (7.5 mi) of the epicenter.

Other events

The 1929 Whittier earthquake occurred on July 8 with a local magnitude of 4.7 and maximum perceived intensity of VII (Very strong) on the Mercalli Intensity scale. The shock occurred at a depth of13 kilometers (8.1 mi) and was most intense to the southwest of the city, where a school and two homes were heavily damaged and other homes sustained chimney collapses. In Santa Fe Springs, oil towers were damaged and some short cracks appeared in the ground. This earthquake was felt from Mount Wilson toSanta Ana, and from Hermosa Beach to Riverside. Numerous aftershocks occurred in the first several hours and persisted through early 1931.

Aftermath

In order to gather funds to help the rebuilding effort, the city of Whittier approved the establishment of a 521-acre earthquake recovery redevelopment area. Through this initiative, property tax revenue is directed to the city rather than to the county and schools, the originally designated recipients. The arrangement will remain in effect until the year 2037.

A nonprofit organization called the Whittier Conservancy was formed shortly after the Whittier Narrows earthquake. The group aids in the preservation of the city’s historical style of construction. During the earthquake, several notable buildings were destroyed, including the Harvey Apartments. They were built with bricks that appeared to have been made by hand during the 19th century; the mud used to make them came from the San Gabriel River. The Conservancy felt that these bricks were worth saving, not only for the historical value, but also for their aesthetics.

Some effort was made to save and use the bricks for rebuilding the historic apartment on the corner of Greenleaf Avenue and Hadley Street. They spent $15,000 to prevent the usable bricks from being taken during the final demolition of the building. The bricks were then cleaned, then stored until they could be used in the rebuilding of the apartment. The Whittier Conservancy also collaborated in the rezoning of the Hadley neighborhood and was able to help control the rate of new multiple-family dwelling construction.

References

More information: Tap to expand …

Bibliography

Watch “Ed Sheeran – Thinking Out Loud [Official Video]” on YouTube


Thinking Out Loud

Ed Sheeran

LYRICS

When your legs don’t work like they used to before
And I can’t sweep you off of your feet
Will your mouth still remember the taste of my love
Will your eyes still smile from your cheeks

And darling I will be loving you ’til we’re 70
And baby my heart could still fall as hard at 23
And I’m thinking ’bout how people fall in love in mysterious ways
Maybe just the touch of a hand
Oh me I fall in love with you every single day
And I just wanna tell you I am

So honey now
Take me into your loving arms
Kiss me under the light of a thousand stars
Place your head on my beating heart
I’m thinking out loud
Maybe we found love right where we are

When my hair’s all but gone and my memory fades
And the crowds don’t remember my name
When my hands don’t play the strings the same way, mm
I know you will still love me the same

‘Cause honey your soul can never grow old, it’s evergreen
Baby your smile’s forever in my mind and memory

I’m thinking ’bout how people fall in love in mysterious ways
Maybe it’s all part of a plan
I’ll just keep on making the same mistakes
Hoping that you’ll understand

But baby now
Take me into your loving arms
Kiss me under the light of a thousand stars
Place your head on my beating heart
I’m thinking out loud
That maybe we found love right where we are, oh

So baby now
Take me into your loving arms
Kiss me under the light of a thousand stars
Oh darling, place your head on my beating heart
I’m thinking out loud
That maybe we found love right where we are

Oh maybe we found love right where we are
And we found love right where we are

Songwriters: Amy Wadge / Ed Sheeran

Thinking Out Loud lyrics © Sony/ATV Music Publishing LLC, The Royalty Network Inc.

Watch “DURAN DURAN – Come Undone (HQ Sound, HD, Lyrics)” on YouTube