X0303 4 2011-03-09 0 0001311486 Global Geophysical Services Inc GGS 0001480807 Degner Richard A 13927 S. GESSNER RD. MISSOURI CITY TX 77489 1 1 0 0 President, CEO and Chairman Common Stock 2406519 D Common Stock 2011-03-09 4 S 0 10000 14.0394 D 2396519 D This transaction was made pursuant to reporting person's adopted Rule 10b 5-1 plan, dated February 22, 2011 (start date March 9, 2011 - end date February 14, 2012 or the date the aggregate number of shares of stock sold pursuant to the trading plan reaches 325,000 shares) The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions during the day at prices ranging from $14.00 to $14.14, inclusive. The reporting person undertakes to provide to the SEC staff, GGS, and any security holder of GGS, full information regarding the number of shares purchased at each separate price within the range set forth above. /s/ Richard A. Degner 2011-03-11