Preliminary map of landslides in the Pacific Palisades area, city of Los Angeles, California

10.3133/i284 ◽  
1959 ◽  
Keyword(s):  

2021 ◽  
Vol 7 (13) ◽  
pp. eaaz5691
Author(s):  
Kimberly Blisniuk ◽  
Katherine Scharer ◽  
Warren D. Sharp ◽  
Roland Burgmann ◽  
Colin Amos ◽  
...  

The San Andreas fault has the highest calculated time-dependent probability for large-magnitude earthquakes in southern California. However, where the fault is multistranded east of the Los Angeles metropolitan area, it has been uncertain which strand has the fastest slip rate and, therefore, which has the highest probability of a destructive earthquake. Reconstruction of offset Pleistocene-Holocene landforms dated using the uranium-thorium soil carbonate and beryllium-10 surface exposure techniques indicates slip rates of 24.1 ± 3 millimeter per year for the San Andreas fault, with 21.6 ± 2 and 2.5 ± 1 millimeters per year for the Mission Creek and Banning strands, respectively. These data establish the Mission Creek strand as the primary fault bounding the Pacific and North American plates at this latitude and imply that 6 to 9 meters of elastic strain has accumulated along the fault since the most recent surface-rupturing earthquake, highlighting the potential for large earthquakes along this strand.





2019 ◽  
pp. 119-150
Author(s):  
Marissa K. López

Chapter 4 opens with a discussion of the mass graves of unidentified immigrants discovered in South Texas in 2014. How, confronted with these decayed, dismembered border bodies, can literature and art move us beyond horror into a more just tomorrow? To answer, the author turns to two Chicanx science fiction novels: Morales’s The Rag Doll Plagues (1992) and Pita and Sánchez’s Lunar Braceros (2009). Morales’s novel begins in colonial Mexico with a tale of La Mona, an unidentified plague similar to AIDS, and ends in a Los Angeles of the future, now known as LAMEX, beset by a similar disease curable only by the infusion of blood from “pure” Mexicans and threatened by waves of trash, which have taken on the characteristics of an animated organism, rolling in from the Pacific. Lunar Braceros, about nuclear waste workers of the future living on the moon, presents trash as a similarly transformative threat. Both novels offer conflicted visions of the human body as simultaneously of and apart from the land, a vulnerable but powerful catalyzing agent for change. The author frames this chapter with analyses of works in Mexican Canadian digital installation artist Rafael Lozano-Hemmer’s Relational Architecture series.



2019 ◽  
Vol 9 (1) ◽  
Author(s):  
F. Manna ◽  
K. M. Walton ◽  
J. A. Cherry ◽  
B. L. Parker

AbstractModifications to the rates of water flowing from the surface to groundwater (groundwater recharge) due to climate variability are the most difficult to assess because of the lack of direct long-term observations. Here, we analyze the chloride salt distribution below the surface soil on a plateau near Los Angeles to reconstruct the amount of recharge that occurred in the last five centuries. Over this time interval, periods of major high and low recharge with different duration follow each other and this cyclicity is consistent with long-term atmospheric forcing patterns, such as the Pacific Decadal Oscillation. This study determines the range and the natural variability of recharge to groundwater, which sustains local freshwater flow system, and helps forecast future availability of groundwater resource in southern California, where water scarcity is critical to both local and global populations.



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