scholarly journals Search for geothermal seismic noise in the East Mesa area, Imperial Valley, California

1974 ◽  
Author(s):  
H.M. Iyer
Keyword(s):  
Seismic Noise ◽  
Imperial Valley

To: “Search for Geothermal Seismic Noise in the East Mesa Area, Imperial Valley, California,” (v. 40, December 1975, p. 1066–1072).

Geophysics ◽  
1976 ◽  
Vol 41 (2) ◽  
pp. 335-335
Author(s):  
H. M. Iyer
Keyword(s):  
Seismic Noise ◽  
Imperial Valley

In the article, “Search for Geothermal Seismic Noise in the East Mesa Area, Imperial Valley, California,” by H. M. Iyer (v. 40, December 1975, p. 1066–1072), the following corrections should be made:

scholarly journals SEARCH FOR GEOTHERMAL SEISMIC NOISE IN THE EAST MESA AREA, IMPERIAL VALLEY, CALIFORNIA

Geophysics ◽  
1975 ◽  
Vol 40 (6) ◽  
pp. 1066-1072 ◽  
Author(s):  
H. M. Iyer
Keyword(s):  
Heat Flow ◽  
Seismic Noise ◽  
Critical Evaluation ◽  
Thermal Gradients ◽  
Noise Levels ◽  
Imperial Valley ◽  
Bureau Of Reclamation ◽  
Cultural Noise ◽  
Noise Experiment ◽  
The U.S

A seismic noise experiment was conducted in the East Mesa area of Imperial Valley, California, by the U.S. Geological Survey (USGS) in May 1972. There is a pronounced heat flow anomaly over the area, and between July 1972 and the present five deep test wells have been drilled over the anomaly by the U.S. Bureau of Reclamation (U.S. Bureau of Reclamation, 1974). At the time of our survey, we were aware of results from a preliminary seismic noise survey in East Mesa by Teledyne Geotech (Douze and Sorrells, 1972). A detailed noise survey was conducted by Teledyne Geotech soon after our experiment (Geothermal Staff of Teledyne Geotech, 1972). Both the Teledyne Geotech surveys show noise levels (in the 3.0 to 5.0 hz band) 12–18 db higher over the area where the thermal gradients and heat flow reach maximum values than in the surroundings. Our results, on the other hand, show that the seismic noise field in the area is dominated by cultural noise, and it is impossible to see a noise anomaly that can be related to the geothermal phenomena in East Mesa. We think that it is important to take into account this disagreement between the two results in order to make a critical evaluation of the utility of seismic noise as a geothermal prospecting tool. The purpose of this note is to put our findings on record.

Reply by author to discussion by L. J. Katz and W. D. Wagner

Geophysics ◽  
1976 ◽  
Vol 41 (3) ◽  
pp. 542-543
Author(s):  
H. M. Iyer
Keyword(s):  
High Velocity ◽  
Seismic Noise ◽  
Geothermal System ◽  
Imperial Valley ◽  
Geothermal Exploration ◽  
Long Valley ◽  
Exploration Tool ◽  
Ground Noise ◽  
Favorable Conditions

Nowhere in my paper have I questioned the validity of ground noise surveys as a geothermal exploration tool. My conclusions are specifically for the Mesa geothermal anomaly in Imperial Valley, California. I do believe that geothermal seismic noise exists and can be detected under favorable conditions, as was shown at Yellowstone (Iyer and Hitchcock, 1974). At Long Valley, in spite of “1000 head of cattle nibbling” at my geophones (did Drs. Katz and Wagner get the word from the cow’s mouth, perhaps) we found indications of “high‐velocity” seismic noise associated with the geothermal system in the area (Iyer and Hitchcock, 1976).

Ramón “Chunky” Sánchez—¡PRESENTE!

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Russell C. Rodríguez
Keyword(s):  
San Diego ◽  
Culture Clash ◽  
Imperial Valley

On November 5, 2016, hundreds of people convened at the historical landmark of Chicano Park in Barrio Logan, San Diego, to celebrate the life of one of the community’s most revered elders, Ramón “Chunky” Moroyoqui Sánchez. Nuestro querido maestro falleció el día 28 de octubre de 2016. Sánchez, endearingly known as Chunky, was synonymous with Barrio Logan, Chicano Park, Chicano/a music, and San Diego in general. In this city, an auditorium is named in his honor. His image is incorporated in murals. The Chicano comedy troupe Culture Clash developed a vignette about Chunky, and upon his passing the San Diego Chargers’ website featured him in a blog post that included a photo of him with players and cheerleaders. Chunky was also well known beyond the Imperial Valley. The music of Los Alacranes Mojados (the group he started with his brother, Ricardo Sánchez) continues to be embraced in Mexicano/a and Chicano/a communities throughout California and the Southwest. The news of Sánchez’s passing reverberated throughout California like the violent ripples of a pond into which a boulder has been dropped. Ese vato will be missed.

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