Two Strong Earthquakes Struck the Gulf of California (the Sea of Cortez)

April 12, 2012 – Two Strong Earthquakes Struck the Gulf of California: Only 325 miles south of Phoenix, Arizona. The 6.2 and 6.9 magnitude quakes hit early Thursday; April 12th. The USGS chart above shows the activity along the infamous San Andreas Fault Zone, that splits California like the “dagger of doom.” The 800 mile strike/slip fault starts in Northern California and ends below the Salton Sea; where it turns into a zigzag line of spreading and strike/slip faults – where today’s quakes took place.

The earthquake times on the USGS chart are in UTC (GMT) time. For example, the 4.7 magnitude event (bottom of the pink zone) shows the date and time as “2012-04-12 06:48:38,” which means 2012 – April – 12th – 6:48AM and 38 seconds. Subtract seven hours from these UTC (GMT) times to get local time. Therefore, the 6.2 magnitude tremor struck at 12:06AM local time (7:06 – 7:00 = 00:06AM or 12:06AM) Pacific Daylight Time (PDT). Exactly nine minutes and 47 seconds later, a more powerful 6.9 magnitude quake struck in almost the same spot (see the Latitude and Longitude columns). Both quakes were at a relatively shallow 10 kilometers (6 miles) but probably did not produce tsunamis because of the nature of the strike/slip and spreading fault lines. Powerful tsunamis are generally produced by subduction zone faults, where one fault dives under another. This is the case with both the December 26, 2004 Sumatra, Indonesia and March 11, 2011 mega-quakes and tsunamis.

Today’s 6.2 and 6.9 quakes occurred about 85 miles northeast of Guerrero Negro, Baja California, Mexico; 110 miles NNW of Santa Rosalia, Baja CA, Mexico; 130 miles west of Hermosilla, Sonora, Mexico; and 325 miles south of Phoenix, Arizona, USA.
The fear in this situation is that today’s events portend an “awakening” of the San Andreas; leading to a catastrophic release in the San Diego, Los Angeles and/or San Francisco regions.
The Master of Disaster

About wfoster2011

Disaster researcher and current financial and economic news and events: Accidents, economics, financial, news, nature, volcanoes, floods, earthquakes, fires; airplane, ship & train wrecks; tornadoes, mine cave-ins, hurricanes, pestilence, blizzards, storms, tzuami's, explosions, pollution, famine; heat & cold waves; nuclear accidents, drought, stampedes and general. Futures trader using high volume and open interest futures markets. Also, a financial, weather and mundane astrologer with over 30 years of experience. Three University degrees from California State University Northridge: BS - Accounting MS - Busines Administration BA - Psychology Served in the U. S. Army as an Armored Platoon Leader in the 5th Battalion, 68th Armored Regiment, 8th Infantry Division (Retired). Have published three books and 36 articles available for sale through my blog: Commodology - Secret of Soyobeans (Financial Astrology) Timing is the Key (Financial Astrology) Scum City, a fiction novel (no longer available, under contract to major publisher) Currently resident of Las Vegas, NV, USA
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3 Responses to Two Strong Earthquakes Struck the Gulf of California (the Sea of Cortez)

  1. Jacquelyn Fedyk says:

    I wonder when the last time was that the Sea of Cortez had earthquakes that large?

    • wfoster2011 says:

      The third map down shows the “Seismicity 1990 to Present.” In other words, all those orange dots represent earthquakes of moderate size over the last 22 years (1990 to 2012). As you can see, quakes along the lower zigzag portion of the San Andreas Fault zone are very common, however, the size of our recent events is not. If I turn anything up in my database of volcanos, I’ll post it here.
      Bill Foster

      • wfoster2011 says:

        Using my 39 year database, their was a 6.7 magnitude quake on Oct. 21, 2010 at 24.69N and 109.16 W; which puts it inland too far from the Sea of Cortez. However, using a larger database I found another 6.9 magnitude event on Dec. 4, 1948 that occurred near the Maria Madre Islands; which puts it at the southern end of the Sea of Cortez (south of Mazatlan). That quaker killed four and injured 21. Therefore, the 6.9 magnitude quake we recently had seems very rare. Any unusual activity along the San Andreas Fault is suspect and may portend larger events in the future.
        Bill Foster

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