Eastern Interconnection Frequency Events
(updated as events are recorded.)
All times are UTC.
Generated at 12:35:03 10-Jul-2025 UTC.
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/01/25 |
04:00:05 |
04:00:09 |
-0.026 |
-0.0051 |
VT ROC |
| 07/01/25 |
04:00:06 |
04:00:11 |
-0.026 |
-0.0047 |
Delta - |
| 07/01/25 |
14:16:50 |
14:16:59 |
-0.058 |
-0.0097 |
VT ROC |
| 07/01/25 |
14:16:49 |
14:17:03 |
-0.060 |
-0.0085 |
Delta - |
| 07/01/25 |
15:02:20 |
15:02:24 |
-0.025 |
-0.0058 |
VT ROC |
| 07/01/25 |
15:02:22 |
15:02:29 |
-0.027 |
-0.0045 |
Delta - |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/02/25 |
04:00:06 |
04:00:09 |
-0.022 |
-0.0040 |
VT ROC |
| 07/02/25 |
11:00:07 |
11:00:15 |
-0.027 |
-0.0035 |
Delta - |
| 07/02/25 |
11:01:58 |
11:02:02 |
0.024 |
0.0036 |
Delta + |
| 07/02/25 |
14:30:43 |
14:30:51 |
0.028 |
0.0036 |
Delta + |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/03/25 |
13:01:46 |
13:01:47 |
0.021 |
0.0036 |
VT ROC |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/04/25 |
00:00:05 |
00:00:09 |
-0.027 |
-0.0038 |
VT ROC |
| 07/04/25 |
04:00:06 |
04:00:10 |
-0.026 |
-0.0048 |
VT ROC |
| 07/04/25 |
04:00:05 |
04:00:12 |
-0.027 |
-0.0041 |
Delta - |
| 07/04/25 |
14:13:00 |
14:13:05 |
0.025 |
0.0036 |
Delta + |
| 07/04/25 |
17:00:05 |
17:00:09 |
-0.031 |
-0.0044 |
VT ROC |
| 07/04/25 |
17:00:03 |
17:00:14 |
-0.032 |
-0.0041 |
Delta - |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/05/25 |
00:00:04 |
00:00:09 |
-0.033 |
-0.0049 |
VT ROC |
| 07/05/25 |
00:00:02 |
00:00:13 |
-0.035 |
-0.0041 |
Delta - |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/06/25 |
04:00:06 |
04:00:08 |
-0.020 |
-0.0043 |
VT ROC |
| 07/06/25 |
05:00:05 |
05:00:09 |
-0.026 |
-0.0048 |
VT ROC |
| 07/06/25 |
05:00:05 |
05:00:11 |
-0.026 |
-0.0040 |
Delta - |
| 07/06/25 |
09:40:29 |
09:40:32 |
0.029 |
0.0042 |
VT ROC |
| 07/06/25 |
09:40:26 |
09:40:35 |
0.030 |
0.0037 |
Delta + |
| 07/06/25 |
12:00:05 |
12:00:10 |
-0.028 |
-0.0041 |
VT ROC |
| 07/06/25 |
12:00:05 |
12:00:13 |
-0.029 |
-0.0041 |
Delta - |
| 07/06/25 |
13:40:13 |
13:40:17 |
0.030 |
0.0039 |
VT ROC |
| 07/06/25 |
13:40:10 |
13:40:20 |
0.031 |
0.0037 |
Delta + |
| 07/06/25 |
14:47:35 |
14:47:39 |
0.025 |
0.0045 |
VT ROC |
| 07/06/25 |
14:47:35 |
14:47:42 |
0.027 |
0.0041 |
Delta + |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/07/25 |
01:04:57 |
01:05:36 |
59.936 |
|
Under 59.940 |
| 07/07/25 |
04:00:06 |
04:00:09 |
-0.026 |
-0.0046 |
VT ROC |
| 07/07/25 |
04:00:06 |
04:00:13 |
-0.027 |
-0.0040 |
Delta - |
| 07/07/25 |
12:21:18 |
12:21:30 |
0.030 |
0.0037 |
Delta + |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/08/25 |
00:00:06 |
00:00:08 |
-0.024 |
-0.0035 |
VT ROC |
| 07/08/25 |
15:53:57 |
15:54:01 |
-0.031 |
-0.0056 |
VT ROC |
| 07/08/25 |
15:53:57 |
15:54:08 |
-0.034 |
-0.0047 |
Delta - |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/09/25 |
00:00:06 |
00:00:09 |
-0.027 |
-0.0043 |
VT ROC |
| 07/09/25 |
00:00:04 |
00:00:12 |
-0.028 |
-0.0037 |
Delta - |
| Date |
Pickup |
Dropout |
Delta (Hz) |
Slope(Hz/sec) |
Type |
| 07/10/25 |
12:34:42 |
12:34:50 |
0.029 |
0.0036 |
Delta + |
PSFM Hardware and software by Robert M. Orndorff
Generated at 12:35:03 10-Jul-2025 UTC.
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