Eastern Interconnection Frequency Events
(updated as events are recorded.)
All times are UTC.
Generated at 10:22:42 23-Mar-2023 UTC.
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/01/23 |
03:00:06 |
03:00:09 |
-0.027 |
-0.0041 |
VT ROC |
03/01/23 |
03:00:05 |
03:00:12 |
-0.027 |
-0.0037 |
Delta - |
03/01/23 |
05:33:31 |
05:34:32 |
59.932 |
  |
Under 59.940 |
03/01/23 |
05:34:36 |
05:34:48 |
59.937 |
  |
Under 59.940 |
03/01/23 |
05:34:52 |
05:43:08 |
59.912 |
  |
Under 59.940 |
03/01/23 |
05:44:49 |
05:44:51 |
0.023 |
0.0036 |
VT ROC |
03/01/23 |
05:44:49 |
05:45:01 |
0.029 |
0.0038 |
Delta + |
03/01/23 |
08:23:13 |
08:23:14 |
0.023 |
0.0036 |
VT ROC |
03/01/23 |
08:58:26 |
08:58:27 |
0.025 |
0.0041 |
VT ROC |
03/01/23 |
10:16:17 |
10:16:20 |
0.028 |
0.0038 |
VT ROC |
03/01/23 |
10:16:15 |
10:16:24 |
0.031 |
0.0037 |
Delta + |
03/01/23 |
10:30:55 |
10:31:01 |
0.035 |
0.0055 |
VT ROC |
03/01/23 |
10:30:55 |
10:31:04 |
0.036 |
0.0050 |
Delta + |
03/01/23 |
11:11:39 |
11:11:41 |
0.024 |
0.0041 |
VT ROC |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/02/23 |
01:00:07 |
01:00:09 |
-0.023 |
-0.0039 |
VT ROC |
03/02/23 |
02:10:06 |
02:10:08 |
-0.025 |
-0.0037 |
VT ROC |
03/02/23 |
05:00:06 |
05:00:10 |
-0.025 |
-0.0049 |
VT ROC |
03/02/23 |
05:00:07 |
05:00:13 |
-0.025 |
-0.0041 |
Delta - |
03/02/23 |
07:00:20 |
07:00:24 |
-0.027 |
-0.0036 |
VT ROC |
03/02/23 |
07:00:19 |
07:00:30 |
-0.029 |
-0.0037 |
Delta - |
03/02/23 |
08:54:33 |
08:54:37 |
0.029 |
0.0043 |
VT ROC |
03/02/23 |
08:54:33 |
08:54:42 |
0.031 |
0.0041 |
Delta + |
03/02/23 |
10:05:23 |
10:05:26 |
0.028 |
0.0044 |
VT ROC |
03/02/23 |
10:05:20 |
10:05:29 |
0.029 |
0.0039 |
Delta + |
03/02/23 |
10:09:59 |
10:10:04 |
0.035 |
0.0050 |
VT ROC |
03/02/23 |
10:09:57 |
10:10:07 |
0.036 |
0.0048 |
Delta + |
03/02/23 |
10:46:16 |
10:46:18 |
0.025 |
0.0043 |
VT ROC |
03/02/23 |
10:46:15 |
10:46:22 |
0.026 |
0.0037 |
Delta + |
03/02/23 |
11:16:20 |
11:16:25 |
0.033 |
0.0047 |
VT ROC |
03/02/23 |
11:16:19 |
11:16:30 |
0.035 |
0.0043 |
Delta + |
03/02/23 |
11:30:05 |
11:30:09 |
-0.029 |
-0.0043 |
VT ROC |
03/02/23 |
11:30:03 |
11:30:13 |
-0.030 |
-0.0040 |
Delta - |
03/02/23 |
16:28:59 |
16:29:03 |
0.031 |
0.0040 |
VT ROC |
03/02/23 |
16:28:57 |
16:29:06 |
0.032 |
0.0039 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/03/23 |
05:00:06 |
05:00:09 |
-0.023 |
-0.0035 |
Delta - |
03/03/23 |
05:00:06 |
05:00:09 |
-0.023 |
-0.0039 |
VT ROC |
03/03/23 |
05:59:33 |
05:59:37 |
0.030 |
0.0043 |
VT ROC |
03/03/23 |
05:59:29 |
05:59:40 |
0.032 |
0.0039 |
Delta + |
03/03/23 |
06:00:06 |
06:00:09 |
-0.027 |
-0.0040 |
VT ROC |
03/03/23 |
06:00:05 |
06:00:15 |
-0.029 |
-0.0038 |
Delta - |
03/03/23 |
09:05:58 |
09:05:59 |
0.022 |
0.0036 |
VT ROC |
03/03/23 |
09:06:00 |
09:06:02 |
0.027 |
0.0039 |
VT ROC |
03/03/23 |
09:05:59 |
09:06:06 |
0.028 |
0.0040 |
Delta + |
03/03/23 |
10:01:42 |
10:01:44 |
0.021 |
0.0040 |
VT ROC |
03/03/23 |
10:01:44 |
10:01:46 |
0.023 |
0.0037 |
VT ROC |
03/03/23 |
10:26:39 |
10:26:41 |
0.024 |
0.0042 |
VT ROC |
03/03/23 |
10:26:39 |
10:26:44 |
0.026 |
0.0036 |
Delta + |
03/03/23 |
11:15:10 |
11:15:16 |
0.041 |
0.0062 |
VT ROC |
03/03/23 |
11:15:08 |
11:15:21 |
0.043 |
0.0054 |
Delta + |
03/03/23 |
22:46:13 |
22:46:19 |
-0.030 |
-0.0044 |
VT ROC |
03/03/23 |
22:46:14 |
22:46:24 |
-0.032 |
-0.0042 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/04/23 |
10:00:29 |
10:00:36 |
0.042 |
0.0071 |
VT ROC |
03/04/23 |
10:00:27 |
10:00:39 |
0.043 |
0.0065 |
Delta + |
03/04/23 |
13:05:59 |
13:06:04 |
0.040 |
0.0080 |
VT ROC |
03/04/23 |
13:05:57 |
13:06:08 |
0.040 |
0.0067 |
Delta + |
03/04/23 |
21:00:14 |
21:00:16 |
0.027 |
0.0036 |
VT ROC |
03/04/23 |
21:00:11 |
21:00:18 |
0.028 |
0.0036 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/05/23 |
04:20:07 |
04:20:11 |
-0.026 |
-0.0042 |
VT ROC |
03/05/23 |
04:20:07 |
04:20:14 |
-0.028 |
-0.0039 |
Delta - |
03/05/23 |
09:59:27 |
09:59:31 |
0.027 |
0.0048 |
VT ROC |
03/05/23 |
09:59:26 |
09:59:34 |
0.029 |
0.0042 |
Delta + |
03/05/23 |
13:53:21 |
13:53:24 |
-0.026 |
-0.0043 |
VT ROC |
03/05/23 |
13:53:20 |
13:53:26 |
-0.027 |
-0.0039 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/06/23 |
03:00:07 |
03:00:08 |
-0.026 |
-0.0038 |
VT ROC |
03/06/23 |
03:34:32 |
03:34:36 |
-0.033 |
-0.0044 |
VT ROC |
03/06/23 |
03:34:30 |
03:34:40 |
-0.034 |
-0.0043 |
Delta - |
03/06/23 |
05:00:07 |
05:00:09 |
-0.022 |
-0.0040 |
VT ROC |
03/06/23 |
18:15:05 |
18:15:07 |
-0.029 |
-0.0041 |
VT ROC |
03/06/23 |
18:15:00 |
18:15:09 |
-0.031 |
-0.0039 |
Delta - |
03/06/23 |
21:26:41 |
21:26:45 |
0.030 |
0.0045 |
VT ROC |
03/06/23 |
21:26:40 |
21:26:55 |
0.034 |
0.0042 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/07/23 |
05:00:05 |
05:00:09 |
-0.027 |
-0.0049 |
VT ROC |
03/07/23 |
05:00:04 |
05:00:11 |
-0.028 |
-0.0041 |
Delta - |
03/07/23 |
05:38:17 |
05:38:19 |
0.026 |
0.0038 |
VT ROC |
03/07/23 |
05:38:15 |
05:38:24 |
0.028 |
0.0037 |
Delta + |
03/07/23 |
10:00:07 |
10:00:14 |
-0.026 |
-0.0037 |
Delta - |
03/07/23 |
16:48:31 |
16:48:33 |
0.027 |
0.0038 |
VT ROC |
03/07/23 |
16:48:28 |
16:48:35 |
0.028 |
0.0035 |
Delta + |
03/07/23 |
21:27:25 |
21:27:26 |
0.029 |
0.0042 |
VT ROC |
03/07/23 |
21:27:27 |
21:27:29 |
0.030 |
0.0039 |
VT ROC |
03/07/23 |
21:27:23 |
21:27:33 |
0.032 |
0.0042 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/08/23 |
05:00:06 |
05:00:10 |
-0.028 |
-0.0045 |
VT ROC |
03/08/23 |
05:00:05 |
05:00:14 |
-0.029 |
-0.0044 |
Delta - |
03/08/23 |
05:35:52 |
05:36:02 |
-0.031 |
-0.0036 |
Delta - |
03/08/23 |
11:13:11 |
11:13:14 |
0.022 |
0.0038 |
VT ROC |
03/08/23 |
11:13:12 |
11:13:21 |
0.027 |
0.0035 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/09/23 |
09:07:12 |
09:07:18 |
0.032 |
0.0051 |
VT ROC |
03/09/23 |
09:07:13 |
09:07:24 |
0.033 |
0.0047 |
Delta + |
03/09/23 |
10:02:38 |
10:02:42 |
0.024 |
0.0042 |
VT ROC |
03/09/23 |
10:02:38 |
10:02:48 |
0.031 |
0.0040 |
Delta + |
03/09/23 |
11:27:34 |
11:27:36 |
0.023 |
0.0043 |
VT ROC |
03/09/23 |
11:27:35 |
11:27:42 |
0.028 |
0.0036 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/10/23 |
09:44:33 |
09:44:33 |
0.022 |
0.0036 |
VT ROC |
03/10/23 |
09:44:34 |
09:44:36 |
0.025 |
0.0044 |
VT ROC |
03/10/23 |
09:44:33 |
09:44:39 |
0.026 |
0.0039 |
Delta + |
03/10/23 |
10:05:18 |
10:05:20 |
0.022 |
0.0035 |
VT ROC |
03/10/23 |
10:41:41 |
10:41:45 |
0.025 |
0.0039 |
VT ROC |
03/10/23 |
10:41:42 |
10:41:50 |
0.029 |
0.0037 |
Delta + |
03/10/23 |
15:32:32 |
15:32:40 |
-0.043 |
-0.0072 |
VT ROC |
03/10/23 |
15:32:31 |
15:32:43 |
-0.044 |
-0.0068 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/11/23 |
05:00:07 |
05:00:10 |
-0.020 |
-0.0036 |
VT ROC |
03/11/23 |
05:00:08 |
05:00:16 |
-0.028 |
-0.0036 |
Delta - |
03/11/23 |
05:30:00 |
05:30:02 |
-0.029 |
-0.0036 |
VT ROC |
03/11/23 |
05:29:57 |
05:30:07 |
-0.030 |
-0.0036 |
Delta - |
03/11/23 |
10:38:22 |
10:38:28 |
0.033 |
0.0042 |
VT ROC |
03/11/23 |
10:38:20 |
10:38:31 |
0.034 |
0.0041 |
Delta + |
03/11/23 |
11:00:50 |
11:00:53 |
0.027 |
0.0042 |
VT ROC |
03/11/23 |
11:00:50 |
11:00:58 |
0.029 |
0.0040 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/12/23 |
05:00:06 |
05:00:09 |
-0.021 |
-0.0040 |
VT ROC |
03/12/23 |
06:00:05 |
06:00:09 |
-0.024 |
-0.0037 |
VT ROC |
03/12/23 |
06:00:03 |
06:00:09 |
-0.025 |
-0.0035 |
Delta - |
03/12/23 |
09:31:24 |
09:31:27 |
0.024 |
0.0040 |
VT ROC |
03/12/23 |
09:31:24 |
09:31:33 |
0.028 |
0.0036 |
Delta + |
03/12/23 |
10:45:12 |
10:45:17 |
0.032 |
0.0041 |
VT ROC |
03/12/23 |
10:45:11 |
10:45:20 |
0.033 |
0.0040 |
Delta + |
03/12/23 |
21:00:51 |
21:00:55 |
0.030 |
0.0048 |
VT ROC |
03/12/23 |
21:00:56 |
21:00:57 |
0.030 |
0.0037 |
VT ROC |
03/12/23 |
21:00:51 |
21:01:01 |
0.032 |
0.0045 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/13/23 |
07:59:16 |
07:59:17 |
0.020 |
0.0035 |
VT ROC |
03/13/23 |
08:10:47 |
08:10:48 |
0.025 |
0.0036 |
VT ROC |
03/13/23 |
09:01:21 |
09:01:24 |
0.023 |
0.0042 |
VT ROC |
03/13/23 |
18:21:50 |
18:21:52 |
-0.028 |
-0.0038 |
VT ROC |
03/13/23 |
18:21:48 |
18:21:58 |
-0.029 |
-0.0036 |
Delta - |
03/13/23 |
20:30:14 |
20:30:22 |
0.030 |
0.0036 |
Delta + |
03/13/23 |
22:40:52 |
22:40:54 |
0.026 |
0.0042 |
VT ROC |
03/13/23 |
22:40:51 |
22:40:58 |
0.027 |
0.0037 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/14/23 |
06:21:16 |
06:21:17 |
0.026 |
0.0042 |
VT ROC |
03/14/23 |
06:21:15 |
06:21:26 |
0.030 |
0.0039 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/15/23 |
23:48:39 |
23:48:42 |
0.028 |
0.0043 |
VT ROC |
03/15/23 |
23:48:37 |
23:48:47 |
0.030 |
0.0040 |
Delta + |
03/15/23 |
23:53:52 |
23:53:57 |
0.031 |
0.0040 |
VT ROC |
03/15/23 |
23:53:50 |
23:54:04 |
0.032 |
0.0038 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/16/23 |
21:02:18 |
21:02:20 |
0.027 |
0.0037 |
VT ROC |
03/16/23 |
21:02:21 |
21:02:23 |
0.031 |
0.0042 |
VT ROC |
03/16/23 |
21:02:17 |
21:02:27 |
0.032 |
0.0041 |
Delta + |
03/16/23 |
23:26:39 |
23:26:50 |
59.939 |
  |
Under 59.940 |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/17/23 |
10:12:27 |
10:12:31 |
0.025 |
0.0041 |
VT ROC |
03/17/23 |
10:12:28 |
10:12:34 |
0.026 |
0.0040 |
Delta + |
03/17/23 |
11:00:07 |
11:00:09 |
-0.024 |
-0.0038 |
VT ROC |
03/17/23 |
11:00:08 |
11:00:18 |
-0.030 |
-0.0036 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/18/23 |
07:13:14 |
07:13:17 |
0.022 |
0.0041 |
VT ROC |
03/18/23 |
07:13:15 |
07:13:22 |
0.027 |
0.0037 |
Delta + |
03/18/23 |
20:40:24 |
20:40:26 |
0.030 |
0.0047 |
VT ROC |
03/18/23 |
20:40:21 |
20:40:29 |
0.031 |
0.0041 |
Delta + |
03/18/23 |
23:53:02 |
23:53:04 |
0.022 |
0.0041 |
VT ROC |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/19/23 |
10:13:35 |
10:13:37 |
0.021 |
0.0043 |
VT ROC |
03/19/23 |
11:00:05 |
11:00:11 |
-0.035 |
-0.0045 |
VT ROC |
03/19/23 |
11:00:02 |
11:00:16 |
-0.036 |
-0.0043 |
Delta - |
03/19/23 |
22:19:10 |
22:19:17 |
0.027 |
0.0036 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/20/23 |
00:26:24 |
00:26:26 |
-0.025 |
-0.0040 |
VT ROC |
03/20/23 |
00:26:24 |
00:26:30 |
-0.026 |
-0.0037 |
Delta - |
03/20/23 |
07:30:31 |
07:30:33 |
0.027 |
0.0042 |
VT ROC |
03/20/23 |
07:30:33 |
07:30:35 |
0.027 |
0.0036 |
VT ROC |
03/20/23 |
07:30:30 |
07:30:40 |
0.029 |
0.0041 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/21/23 |
04:00:06 |
04:00:09 |
-0.021 |
-0.0044 |
VT ROC |
03/21/23 |
07:00:33 |
07:00:37 |
0.029 |
0.0049 |
VT ROC |
03/21/23 |
07:00:32 |
07:00:42 |
0.030 |
0.0043 |
Delta + |
03/21/23 |
07:30:23 |
07:30:25 |
0.023 |
0.0039 |
VT ROC |
03/21/23 |
07:30:23 |
07:30:34 |
0.027 |
0.0036 |
Delta + |
03/21/23 |
21:36:56 |
21:37:06 |
0.029 |
0.0035 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/22/23 |
04:00:05 |
04:00:08 |
-0.027 |
-0.0042 |
VT ROC |
03/22/23 |
04:00:03 |
04:00:09 |
-0.028 |
-0.0035 |
Delta - |
03/22/23 |
10:00:07 |
10:00:09 |
-0.025 |
-0.0039 |
VT ROC |
03/22/23 |
10:00:07 |
10:00:16 |
-0.026 |
-0.0037 |
Delta - |
03/22/23 |
10:12:36 |
10:12:40 |
0.026 |
0.0041 |
VT ROC |
03/22/23 |
10:12:36 |
10:12:42 |
0.027 |
0.0038 |
Delta + |
03/22/23 |
16:41:26 |
16:41:29 |
-0.025 |
-0.0045 |
VT ROC |
03/22/23 |
16:41:26 |
16:41:31 |
-0.025 |
-0.0040 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
03/23/23 |
08:04:27 |
08:04:31 |
0.026 |
0.0043 |
VT ROC |
03/23/23 |
08:04:27 |
08:04:36 |
0.028 |
0.0037 |
Delta + |
03/23/23 |
09:30:40 |
09:30:46 |
0.036 |
0.0054 |
VT ROC |
03/23/23 |
09:30:39 |
09:30:49 |
0.037 |
0.0052 |
Delta + |
03/23/23 |
10:22:23 |
10:22:27 |
0.032 |
0.0045 |
VT ROC |
03/23/23 |
10:22:22 |
10:22:33 |
0.034 |
0.0040 |
Delta + |
PSFM Hardware and software by Robert M. Orndorff
Generated at 10:22:42 23-Mar-2023 UTC.
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