Eastern Interconnection Frequency Events
(updated as events are recorded.)
All times are UTC.
Generated at 04:00:17 16-Jun-2025 UTC.
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/01/25 |
04:00:05 |
04:00:10 |
-0.032 |
-0.0059 |
VT ROC |
06/01/25 |
04:00:05 |
04:00:13 |
-0.033 |
-0.0051 |
Delta - |
06/01/25 |
06:10:42 |
06:10:47 |
0.030 |
0.0040 |
VT ROC |
06/01/25 |
06:10:41 |
06:10:50 |
0.031 |
0.0039 |
Delta + |
06/01/25 |
09:00:07 |
09:00:09 |
-0.022 |
-0.0035 |
VT ROC |
06/01/25 |
10:11:21 |
10:11:24 |
0.029 |
0.0040 |
VT ROC |
06/01/25 |
10:11:19 |
10:11:29 |
0.030 |
0.0036 |
Delta + |
06/01/25 |
12:30:24 |
12:30:27 |
0.024 |
0.0038 |
VT ROC |
06/01/25 |
12:30:25 |
12:30:30 |
0.026 |
0.0037 |
Delta + |
06/01/25 |
13:10:29 |
13:10:32 |
0.024 |
0.0038 |
VT ROC |
06/01/25 |
16:25:09 |
16:25:11 |
0.023 |
0.0039 |
VT ROC |
06/01/25 |
16:25:11 |
16:25:18 |
0.027 |
0.0038 |
Delta + |
06/01/25 |
17:05:21 |
17:05:23 |
0.033 |
0.0043 |
VT ROC |
06/01/25 |
17:05:24 |
17:05:26 |
0.034 |
0.0042 |
VT ROC |
06/01/25 |
17:05:17 |
17:05:31 |
0.035 |
0.0044 |
Delta + |
06/01/25 |
18:54:36 |
18:54:38 |
-0.025 |
-0.0036 |
VT ROC |
06/01/25 |
23:44:07 |
23:44:09 |
-0.021 |
-0.0036 |
VT ROC |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/02/25 |
05:00:06 |
05:00:09 |
-0.020 |
-0.0037 |
VT ROC |
06/02/25 |
08:40:30 |
08:40:31 |
0.027 |
0.0037 |
VT ROC |
06/02/25 |
08:40:27 |
08:40:36 |
0.028 |
0.0037 |
Delta + |
06/02/25 |
09:05:58 |
09:06:01 |
0.029 |
0.0044 |
VT ROC |
06/02/25 |
09:05:55 |
09:06:03 |
0.030 |
0.0043 |
Delta + |
06/02/25 |
16:00:05 |
16:00:08 |
-0.024 |
-0.0041 |
VT ROC |
06/02/25 |
17:57:11 |
17:57:12 |
0.028 |
0.0038 |
VT ROC |
06/02/25 |
22:59:20 |
22:59:24 |
-0.026 |
-0.0042 |
VT ROC |
06/02/25 |
22:59:21 |
22:59:28 |
-0.028 |
-0.0039 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/03/25 |
01:36:46 |
01:36:50 |
-0.028 |
-0.0042 |
VT ROC |
06/03/25 |
01:36:47 |
01:36:56 |
-0.031 |
-0.0040 |
Delta - |
06/03/25 |
04:00:05 |
04:00:09 |
-0.025 |
-0.0047 |
VT ROC |
06/03/25 |
04:00:06 |
04:00:10 |
-0.025 |
-0.0041 |
Delta - |
06/03/25 |
10:02:27 |
10:02:29 |
0.027 |
0.0037 |
VT ROC |
06/03/25 |
10:02:25 |
10:02:35 |
0.029 |
0.0036 |
Delta + |
06/03/25 |
10:11:22 |
10:11:24 |
0.026 |
0.0045 |
VT ROC |
06/03/25 |
10:11:25 |
10:11:26 |
0.030 |
0.0037 |
VT ROC |
06/03/25 |
10:11:22 |
10:11:31 |
0.031 |
0.0042 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/04/25 |
00:00:06 |
00:00:09 |
-0.028 |
-0.0037 |
VT ROC |
06/04/25 |
00:00:03 |
00:00:12 |
-0.029 |
-0.0039 |
Delta - |
06/04/25 |
00:09:50 |
00:09:52 |
-0.022 |
-0.0038 |
VT ROC |
06/04/25 |
00:09:51 |
00:09:56 |
-0.025 |
-0.0036 |
Delta - |
06/04/25 |
04:00:05 |
04:00:10 |
-0.031 |
-0.0055 |
VT ROC |
06/04/25 |
04:00:05 |
04:00:13 |
-0.031 |
-0.0048 |
Delta - |
06/04/25 |
09:00:05 |
09:00:09 |
-0.031 |
-0.0054 |
VT ROC |
06/04/25 |
09:00:05 |
09:00:14 |
-0.032 |
-0.0047 |
Delta - |
06/04/25 |
20:42:23 |
20:42:27 |
-0.024 |
-0.0051 |
VT ROC |
06/04/25 |
20:42:24 |
20:42:29 |
-0.025 |
-0.0041 |
Delta - |
06/04/25 |
23:00:05 |
23:00:09 |
-0.028 |
-0.0050 |
VT ROC |
06/04/25 |
23:00:04 |
23:00:13 |
-0.028 |
-0.0042 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/05/25 |
04:00:06 |
04:00:09 |
-0.024 |
-0.0046 |
VT ROC |
06/05/25 |
04:00:06 |
04:00:10 |
-0.024 |
-0.0039 |
Delta - |
06/05/25 |
05:00:05 |
05:00:09 |
-0.028 |
-0.0048 |
VT ROC |
06/05/25 |
05:00:03 |
05:00:13 |
-0.029 |
-0.0041 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/06/25 |
04:00:06 |
04:00:09 |
-0.027 |
-0.0051 |
VT ROC |
06/06/25 |
04:00:06 |
04:00:13 |
-0.028 |
-0.0044 |
Delta - |
06/06/25 |
05:00:05 |
05:00:09 |
-0.030 |
-0.0048 |
VT ROC |
06/06/25 |
05:00:04 |
05:00:14 |
-0.031 |
-0.0043 |
Delta - |
06/06/25 |
09:50:56 |
09:50:57 |
0.025 |
0.0038 |
VT ROC |
06/06/25 |
09:50:54 |
09:51:01 |
0.026 |
0.0038 |
Delta + |
06/06/25 |
10:00:06 |
10:00:09 |
-0.026 |
-0.0038 |
VT ROC |
06/06/25 |
10:00:04 |
10:00:11 |
-0.027 |
-0.0037 |
Delta - |
06/06/25 |
23:10:53 |
23:10:56 |
-0.028 |
-0.0059 |
VT ROC |
06/06/25 |
23:10:53 |
23:11:03 |
-0.032 |
-0.0047 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/07/25 |
13:15:30 |
13:15:34 |
-0.028 |
-0.0054 |
VT ROC |
06/07/25 |
13:15:30 |
13:15:38 |
-0.029 |
-0.0049 |
Delta - |
06/07/25 |
14:05:09 |
14:05:13 |
0.029 |
0.0050 |
VT ROC |
06/07/25 |
14:05:09 |
14:05:19 |
0.031 |
0.0044 |
Delta + |
06/07/25 |
15:15:30 |
15:15:31 |
0.024 |
0.0036 |
VT ROC |
06/07/25 |
21:47:06 |
21:47:08 |
-0.024 |
-0.0036 |
VT ROC |
06/07/25 |
23:00:07 |
23:00:09 |
-0.023 |
-0.0038 |
VT ROC |
06/07/25 |
23:00:07 |
23:00:15 |
-0.026 |
-0.0036 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/08/25 |
13:55:10 |
13:55:14 |
0.026 |
0.0043 |
VT ROC |
06/08/25 |
13:55:11 |
13:55:17 |
0.027 |
0.0041 |
Delta + |
06/08/25 |
14:07:48 |
14:07:49 |
0.024 |
0.0035 |
VT ROC |
06/08/25 |
14:07:48 |
14:08:01 |
0.034 |
0.0036 |
Delta + |
06/08/25 |
16:04:38 |
16:04:39 |
0.027 |
0.0035 |
VT ROC |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/09/25 |
03:12:05 |
03:12:07 |
-0.028 |
-0.0038 |
VT ROC |
06/09/25 |
03:12:04 |
03:12:12 |
-0.029 |
-0.0036 |
Delta - |
06/09/25 |
04:00:05 |
04:00:10 |
-0.030 |
-0.0054 |
VT ROC |
06/09/25 |
04:00:04 |
04:00:11 |
-0.031 |
-0.0048 |
Delta - |
06/09/25 |
09:00:06 |
09:00:09 |
-0.026 |
-0.0042 |
VT ROC |
06/09/25 |
09:00:04 |
09:00:11 |
-0.027 |
-0.0036 |
Delta - |
06/09/25 |
11:52:49 |
11:52:56 |
-0.027 |
-0.0039 |
Delta - |
06/09/25 |
12:29:15 |
12:29:17 |
0.027 |
0.0036 |
VT ROC |
06/09/25 |
12:29:13 |
12:29:24 |
0.031 |
0.0038 |
Delta + |
06/09/25 |
13:00:07 |
13:00:11 |
-0.024 |
-0.0037 |
Delta - |
06/09/25 |
13:12:24 |
13:12:26 |
0.026 |
0.0040 |
VT ROC |
06/09/25 |
13:43:16 |
13:43:24 |
0.027 |
0.0036 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/10/25 |
04:00:05 |
04:00:09 |
-0.027 |
-0.0051 |
VT ROC |
06/10/25 |
04:00:05 |
04:00:12 |
-0.028 |
-0.0045 |
Delta - |
06/10/25 |
10:41:37 |
10:41:42 |
0.031 |
0.0045 |
VT ROC |
06/10/25 |
10:41:38 |
10:41:48 |
0.033 |
0.0043 |
Delta + |
06/10/25 |
11:00:06 |
11:00:11 |
-0.031 |
-0.0047 |
VT ROC |
06/10/25 |
11:00:05 |
11:00:15 |
-0.032 |
-0.0045 |
Delta - |
06/10/25 |
11:04:32 |
11:04:34 |
0.027 |
0.0036 |
VT ROC |
06/10/25 |
13:00:06 |
13:00:09 |
-0.023 |
-0.0041 |
VT ROC |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/11/25 |
06:00:07 |
06:00:09 |
-0.026 |
-0.0041 |
VT ROC |
06/11/25 |
06:00:05 |
06:00:12 |
-0.027 |
-0.0037 |
Delta - |
06/11/25 |
10:00:07 |
10:00:13 |
-0.033 |
-0.0046 |
VT ROC |
06/11/25 |
10:00:06 |
10:00:17 |
-0.034 |
-0.0043 |
Delta - |
06/11/25 |
12:45:31 |
12:45:33 |
0.029 |
0.0041 |
VT ROC |
06/11/25 |
12:45:28 |
12:45:37 |
0.030 |
0.0039 |
Delta + |
06/11/25 |
14:56:50 |
14:56:52 |
-0.023 |
-0.0038 |
VT ROC |
06/11/25 |
14:56:50 |
14:56:59 |
-0.028 |
-0.0036 |
Delta - |
06/11/25 |
15:13:17 |
15:13:19 |
0.025 |
0.0043 |
VT ROC |
06/11/25 |
15:13:17 |
15:13:26 |
0.030 |
0.0037 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/12/25 |
11:00:07 |
11:00:09 |
-0.022 |
-0.0038 |
VT ROC |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/13/25 |
04:00:06 |
04:00:09 |
-0.024 |
-0.0048 |
VT ROC |
06/13/25 |
04:00:06 |
04:00:10 |
-0.025 |
-0.0041 |
Delta - |
06/13/25 |
10:00:05 |
10:00:08 |
-0.026 |
-0.0040 |
VT ROC |
06/13/25 |
10:00:04 |
10:00:11 |
-0.027 |
-0.0036 |
Delta - |
06/13/25 |
10:33:59 |
10:34:01 |
-0.029 |
-0.0043 |
VT ROC |
06/13/25 |
10:33:55 |
10:34:04 |
-0.030 |
-0.0039 |
Delta - |
06/13/25 |
12:11:11 |
12:11:16 |
0.031 |
0.0051 |
VT ROC |
06/13/25 |
12:11:10 |
12:11:18 |
0.032 |
0.0045 |
Delta + |
06/13/25 |
22:35:20 |
22:35:24 |
-0.025 |
-0.0050 |
VT ROC |
06/13/25 |
22:35:21 |
22:35:25 |
-0.025 |
-0.0041 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/14/25 |
00:00:05 |
00:00:09 |
-0.033 |
-0.0047 |
VT ROC |
06/14/25 |
00:00:02 |
00:00:15 |
-0.034 |
-0.0044 |
Delta - |
06/14/25 |
04:00:06 |
04:00:08 |
-0.020 |
-0.0039 |
VT ROC |
06/14/25 |
08:51:00 |
08:51:08 |
0.051 |
0.0097 |
VT ROC |
06/14/25 |
08:50:59 |
08:51:11 |
0.052 |
0.0085 |
Delta + |
06/14/25 |
09:37:33 |
09:37:37 |
0.031 |
0.0048 |
VT ROC |
06/14/25 |
09:37:32 |
09:37:41 |
0.032 |
0.0044 |
Delta + |
06/14/25 |
10:26:40 |
10:26:42 |
0.026 |
0.0043 |
VT ROC |
06/14/25 |
10:26:39 |
10:26:45 |
0.027 |
0.0036 |
Delta + |
06/14/25 |
21:56:28 |
21:56:29 |
-0.023 |
-0.0043 |
VT ROC |
06/14/25 |
21:56:28 |
21:56:36 |
-0.028 |
-0.0041 |
Delta - |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/15/25 |
11:01:47 |
11:01:56 |
0.029 |
0.0036 |
Delta + |
06/15/25 |
12:58:29 |
12:58:34 |
0.033 |
0.0043 |
VT ROC |
06/15/25 |
12:58:26 |
12:58:38 |
0.034 |
0.0044 |
Delta + |
06/15/25 |
14:31:22 |
14:31:28 |
0.032 |
0.0044 |
VT ROC |
06/15/25 |
14:31:21 |
14:31:31 |
0.033 |
0.0044 |
Delta + |
06/15/25 |
16:50:47 |
16:50:49 |
0.029 |
0.0043 |
VT ROC |
06/15/25 |
16:50:44 |
16:50:55 |
0.030 |
0.0039 |
Delta + |
Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
06/16/25 |
01:00:05 |
01:00:09 |
-0.027 |
-0.0042 |
VT ROC |
06/16/25 |
01:00:04 |
01:00:11 |
-0.027 |
-0.0036 |
Delta - |
06/16/25 |
04:00:06 |
04:00:10 |
-0.027 |
-0.0050 |
VT ROC |
06/16/25 |
04:00:07 |
04:00:15 |
-0.029 |
-0.0047 |
Delta - |
PSFM Hardware and software by Robert M. Orndorff
Generated at 04:00:17 16-Jun-2025 UTC.
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