Event Type:

Year:

Event Began Date Event Restoration Date Respondent NERC Region Event Type Demand Loss (MW) Number Of Customers Affected Duration (Hrs) New NERC Region New Demand Loss (MW) New Number Of Customers Affected Year New Event Type Row Number Area
09/07/2011 12:08 p.m. 09/07/2011 10:50 a.m. ISO New England NPCC Actual Physical Attack - 0 10.7 NPCC 0 0 2011 Vandalism 0 western connecticut; new york
07/28/2003 6:55 a.m. 07/28/2003 8:35 a.m. Arizona Public Service WECC Breaker Closed 440 90000 1.666666667 WECC 440 90000 2003 Equipment Failure 1 arizona
07/01/2003 3:15 a.m. 07/01/2003 3:50 a.m. Arizona Public Service Company WECC Breaker Failure 1,000 47000 0.583333333 WECC 1,000 47000 2003 Equipment Failure 2 phoenix, arizona
10/10/2004 5:09 a.m. 10/11/2004 7:57 a.m. Puerto Rico Electric Power Authority PR Breaker Failure - 0 26.8 Other 0 0 2004 Equipment Failure 3 island wide
09/12/2005 12:32 p.m. 09/12/2005 1:56 a.m. Los Angeles Department of Water and Power WECC Breaker protection cable accidentally cut 2,578 900000 1.4 WECC 2,578 900000 2005 Equipment Failure 4 california, los angeles
12/20/2003 3:51 a.m. 12/21/2003 11:45 a.m. Pacific Gas and Electric WECC Cable Failure 150 120000 31.9 WECC 150 120000 2003 Equipment Failure 5 california, san francisco
08/25/2005 3:50 a.m. 08/25/2005 8 a.m. California ISO WECC CAISO determined there was inadequate electric resources to serve load. Public appeals and a shedding of interruptible and firm load occurred. - 0 4.166666667 WECC 0 0 2005 Fuel Supply 6 southern california
08/25/2005 3:31 a.m. 08/25/2005 8 a.m. Southern California Edison Company WECC CAISO initiated interruption of interruptible and firm load due to declaration of Transmission Emergency in Southern California 864 409000 4.483333333 WECC 864 409000 2005 Fuel Supply 7 southern california
07/21/2005 2:39 a.m. 07/21/2005 5:30 a.m. Southern California Edison Company WECC CA ISO Stage 2 -Initiated interruption of Air Conditioner Cycling Interruptible Load Program 197 128050 2.85 WECC 197 128050 2005 Voluntary Reduction 8 southern california
07/22/2005 1:55 a.m. 07/22/2005 6 a.m. Southern California Edison Company WECC CA ISO Stage 2 -Initiated interruption of Air Conditioner Cycling Interruptible Load Program 206 133900 4.083333333 WECC 206 133900 2005 Voluntary Reduction 9 southern california
02/09/2011 4:30 a.m. 02/10/2011 12:33 p.m. ERCOT ISO TRE Cold Weather Event N/A 0 20.05 ERCOT 0 0 2011 Cold 10 texas
10/16/2013 11:15 a.m. 10/16/2013 6 a.m. Duke Energy Progress SERC Cyber Event with Potential to Cause Impact - 0 6.75 SERC 0 0 2013 Cyber 11 north carolina, roxboro plant
01/25/2003 2 a.m. 01/26/2003 2 a.m. Cinergy Corporation ECAR Cyber Threat From Internet NA 0 12.0 RFC 0 0 2003 Cyber 12 ohio, cincinnati
01/17/2013 8:35 a.m. 01/17/2013 9:20 a.m. North Carolina Eastern M P A SERC Distribution Interruption 40 12000 0.75 SERC 40 12000 2013 Equipment Failure 13 north carolina, elizabeth city
12/11/2014 7:21 a.m. 12/11/2014 9:53 a.m. Pacific Gas & Electric Co WECC Distribution Interruption - Unknown Cause 225 75000 14.53333333 WECC 225 75000 2014 Equipment Failure 14 california, san francisco
08/27/2011 2 a.m. 08/27/2011 5:15 a.m. Town of Stantonsburg JRO SERC Distribution System Interruption 2 1200 3.25 SERC 2 1200 2011 Equipment Failure 15 wilson county north carolina
12/22/2003 11:15 a.m. 12/22/2003 11:16 a.m. Pacific Gas and Electric WECC Earthquake 220 109750 0.016666667 WECC 220 109750 2003 Earthquake 16 central california coast
08/23/2011 1:51 a.m. 08/23/2011 1:51 a.m. Dominion Virginia Power RFC Earthquake - 0 0.0 RFC 0 0 2011 Earthquake 17 virginia
08/24/2014 3:20 a.m. 08/25/2014 7:05 a.m. PG&E WECC Earthquake 95 70000 27.75 WECC 95 70000 2014 Earthquake 18 california, north of san francisco
01/11/2011 11:08 a.m. 01/11/2011 11:08 a.m. New Athens Generating Co. LLC NPCC Electrical Fault at Generator - 0 0.0 NPCC 0 0 2011 Equipment Failure 19 athens, new york
11/14/2014 9:50 a.m. 11/14/2014 1:18 a.m. Portland General Electric Co WECC Electrical System Islanding 1 123 3.466666667 WECC 1 123 2014 Equipment Failure 20 oregon, estacada
06/09/2014 11:07 a.m. 06/09/2014 11:30 a.m. Peak Reliability WECC Electrical System Islanding Unknown 0 0.383333333 WECC 0 0 2014 Equipment Failure 21 alberta, canada
01/18/2014 5:39 a.m. 01/18/2014 5:39 a.m. First Energy Solutions Corp. RFC Electrical System Islanding Unknown 0 0.0 RFC 0 0 2014 Equipment Failure 22 unknown
06/03/2014 3:32 a.m. 06/03/2014 3:59 a.m. Peak Reliability WECC Electrical System Islanding 338 0 0.45 WECC 338 0 2014 Equipment Failure 23 alberta, canada
08/01/2013 6:54 a.m. 08/01/2013 7:37 a.m. WECC RC Vancouver WECC Electrical System Separation (Islanding 420 0 0.716666667 WECC 420 0 2013 Equipment Failure 24 western british columbia