Latest Articles
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Apr 5, 2012  On January 4th, 2012, AZGS geologists Ann Youberg and Joe Cook traveled to Emigrant Canyon at the north end of the Chiricahua Mountains to assess post-fire erosion following the 2011 Horseshoe 2 Fire |
 Seventy five drilling permits were issued, which set a record for the number of permits issued in a single year (see graph), 67 wells were drilled, and two wells were plugged in 2011. |
 In 2011, 131 instrumentally detected earthquakes were recorded in Arizona. Most of the seismicity occurred in the north-northwest quadrant of the state. |
 Recent exploitation of shale to extract gas and oil has resulted in a boom of drilling and hydraulic fracturing across the United States. The U.S. Energy Information Administration has mapped the primary shale gas basins in the United States as shown in the accompanying figure. None are in Arizona. |
