Eastern Interconnection Frequency Events

Generated by the PSFM-1 Frequency Recorder

(updated as events are recorded.)
All times are UTC.
Generated at 07:58:02 11-May-2021 UTC.

Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/01/21 03:24:07 03:24:11 -0.033 -0.0043 VT ROC
05/01/21 03:24:03 03:24:14 -0.035 -0.0041 Delta -
05/01/21 03:30:22 03:30:28 -0.024 -0.0026 Delta -
05/01/21 05:23:50 05:23:53 0.024 0.0036 Delta +
05/01/21 07:50:03 07:50:07 -0.032 -0.0050 VT ROC
05/01/21 07:50:01 07:50:10 -0.033 -0.0044 Delta -
05/01/21 08:00:08 08:00:11 -0.023 -0.0029 Delta -
05/01/21 08:21:20 08:21:25 0.024 0.0031 Delta +
05/01/21 10:01:42 10:01:51 0.025 0.0027 Delta +
05/01/21 11:00:08 11:00:15 -0.027 -0.0028 Delta -
05/01/21 11:09:40 11:09:44 0.023 0.0030 Delta +
05/01/21 13:22:18 13:22:27 0.024 0.0031 Delta +
05/01/21 14:37:39 14:37:42 0.030 0.0041 VT ROC
05/01/21 14:37:39 14:37:49 0.031 0.0039 Delta +
05/01/21 15:05:42 15:05:44 0.026 0.0043 VT ROC
05/01/21 15:05:41 15:05:50 0.028 0.0040 Delta +
05/01/21 20:46:16 20:46:22 0.025 0.0036 Delta +
05/01/21 22:35:29 22:35:37 0.026 0.0031 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/02/21 03:06:15 03:06:21 0.024 0.0026 Delta +
05/02/21 06:32:36 06:32:38 -0.026 -0.0039 VT ROC
05/02/21 06:32:38 06:32:40 -0.029 -0.0041 VT ROC
05/02/21 06:32:36 06:32:45 -0.031 -0.0043 Delta -
05/02/21 08:30:08 08:30:11 -0.023 -0.0029 Delta -
05/02/21 08:49:04 08:49:09 -0.025 -0.0032 Delta -
05/02/21 09:00:08 09:00:11 -0.023 -0.0031 Delta -
05/02/21 10:41:23 10:41:32 0.028 0.0033 Delta +
05/02/21 11:01:41 11:01:46 0.023 0.0030 Delta +
05/02/21 12:11:08 12:11:13 0.023 0.0027 Delta +
05/02/21 12:32:31 12:32:38 0.024 0.0028 Delta +
05/02/21 12:34:47 12:34:54 0.026 0.0029 Delta +
05/02/21 13:36:41 13:36:50 0.025 0.0028 Delta +
05/02/21 13:53:41 13:53:43 0.024 0.0041 VT ROC
05/02/21 13:53:41 13:53:47 0.026 0.0036 Delta +
05/02/21 18:38:42 18:38:45 0.024 0.0041 VT ROC
05/02/21 18:38:42 18:38:49 0.026 0.0035 Delta +
05/02/21 19:08:58 19:09:03 -0.023 -0.0025 Delta -
05/02/21 20:45:02 20:45:08 -0.025 -0.0025 Delta -
05/02/21 21:30:06 21:30:12 -0.025 -0.0032 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/03/21 02:25:15 02:25:22 0.027 0.0036 Delta +
05/03/21 03:30:10 03:30:16 -0.025 -0.0033 Delta -
05/03/21 03:58:00 03:58:06 -0.026 -0.0031 Delta -
05/03/21 05:56:52 05:56:59 -0.026 -0.0029 Delta -
05/03/21 06:04:23 06:04:33 0.026 0.0031 Delta +
05/03/21 08:00:02 08:00:11 -0.030 -0.0036 Delta -
05/03/21 12:03:02 12:03:11 -0.052 -0.0092 VT ROC
05/03/21 12:03:02 12:03:16 -0.055 -0.0081 Delta -
05/03/21 14:35:53 14:36:03 0.030 0.0034 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/04/21 05:39:04 05:39:08 -0.025 -0.0030 Delta -
05/04/21 07:28:55 07:28:59 0.027 0.0044 VT ROC
05/04/21 07:28:55 07:29:02 0.028 0.0040 Delta +
05/04/21 10:35:47 10:35:52 0.024 0.0028 Delta +
05/04/21 11:43:09 11:43:12 0.023 0.0029 Delta +
05/04/21 11:44:15 11:44:17 0.027 0.0035 VT ROC
05/04/21 11:44:12 11:44:20 0.028 0.0035 Delta +
05/04/21 11:55:35 11:55:43 0.028 0.0033 Delta +
05/04/21 11:56:05 11:56:10 -0.031 -0.0057 VT ROC
05/04/21 11:56:05 11:56:15 -0.032 -0.0049 Delta -
05/04/21 12:46:34 12:46:38 0.032 0.0047 VT ROC
05/04/21 12:46:32 12:46:46 0.035 0.0041 Delta +
05/04/21 14:28:26 14:28:28 -0.024 -0.0036 VT ROC
05/04/21 14:28:25 14:28:32 -0.026 -0.0039 Delta -
05/04/21 20:10:56 20:11:02 0.025 0.0032 Delta +
05/04/21 22:17:09 22:17:18 0.028 0.0036 Delta +
05/04/21 23:51:29 23:51:36 0.025 0.0028 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/05/21 02:16:28 02:16:36 -0.027 -0.0031 Delta -
05/05/21 04:00:05 04:00:09 -0.029 -0.0044 VT ROC
05/05/21 04:00:03 04:00:15 -0.030 -0.0040 Delta -
05/05/21 05:34:45 05:34:51 -0.026 -0.0033 Delta -
05/05/21 06:50:06 06:50:11 -0.025 -0.0032 Delta -
05/05/21 07:56:57 07:57:01 0.024 0.0027 Delta +
05/05/21 09:22:16 09:22:20 0.024 0.0028 Delta +
05/05/21 09:44:35 09:44:37 0.026 0.0041 VT ROC
05/05/21 09:44:35 09:44:42 0.027 0.0038 Delta +
05/05/21 10:04:52 10:04:54 0.024 0.0037 VT ROC
05/05/21 10:04:54 10:04:56 0.027 0.0038 VT ROC
05/05/21 10:04:51 10:04:59 0.028 0.0039 Delta +
05/05/21 10:18:39 10:18:44 0.023 0.0027 Delta +
05/05/21 10:36:07 10:36:15 0.026 0.0032 Delta +
05/05/21 22:01:11 22:01:20 0.026 0.0029 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/06/21 01:40:15 01:40:21 0.024 0.0028 Delta +
05/06/21 09:32:10 09:32:17 0.026 0.0032 Delta +
05/06/21 09:45:16 09:45:24 0.027 0.0034 Delta +
05/06/21 10:10:38 10:10:44 0.027 0.0034 Delta +
05/06/21 10:15:14 10:15:17 0.026 0.0045 VT ROC
05/06/21 10:15:13 10:15:20 0.027 0.0040 Delta +
05/06/21 10:56:52 10:56:59 0.027 0.0033 Delta +
05/06/21 15:00:04 15:00:10 -0.026 -0.0033 Delta -
05/06/21 15:36:12 15:36:20 0.027 0.0030 Delta +
05/06/21 16:23:11 16:23:13 -0.023 -0.0041 VT ROC
05/06/21 16:23:11 16:23:17 -0.026 -0.0038 Delta -
05/06/21 21:10:42 21:11:32 59.933   Under 59.940
05/06/21 21:11:37 21:12:04 59.936   Under 59.940
05/06/21 23:41:24 23:41:27 -0.023 -0.0026 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/07/21 01:23:06 01:23:15 0.026 0.0030 Delta +
05/07/21 02:56:49 02:57:01 -0.034 -0.0037 Delta -
05/07/21 04:00:07 04:00:09 -0.022 -0.0036 VT ROC
05/07/21 05:10:34 05:10:41 -0.025 -0.0029 Delta -
05/07/21 16:02:02 16:02:08 -0.027 -0.0034 Delta -
05/07/21 16:23:11 16:23:17 -0.025 -0.0028 Delta -
05/07/21 17:50:36 17:50:43 -0.025 -0.0030 Delta -
05/07/21 18:52:02 18:52:09 0.025 0.0030 Delta +
05/07/21 19:30:14 19:30:23 -0.027 -0.0031 Delta -
05/07/21 19:41:52 19:42:01 0.026 0.0031 Delta +
05/07/21 20:26:50 20:26:59 -0.029 -0.0034 Delta -
05/07/21 21:04:56 21:05:07 0.030 0.0032 Delta +
05/07/21 23:15:53 23:16:00 0.024 0.0026 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/08/21 00:00:27 00:00:29 -0.023 -0.0037 VT ROC
05/08/21 00:00:27 00:00:36 -0.027 -0.0033 Delta -
05/08/21 00:45:24 00:45:31 0.025 0.0031 Delta +
05/08/21 01:44:09 01:44:14 0.024 0.0031 Delta +
05/08/21 02:05:04 02:05:08 -0.024 -0.0029 Delta -
05/08/21 06:08:55 06:09:01 0.026 0.0033 Delta +
05/08/21 06:10:46 06:10:52 0.026 0.0030 Delta +
05/08/21 07:15:27 07:15:29 0.026 0.0036 VT ROC
05/08/21 07:15:25 07:15:33 0.027 0.0033 Delta +
05/08/21 07:20:14 07:20:20 0.025 0.0030 Delta +
05/08/21 09:08:30 09:08:35 0.025 0.0032 Delta +
05/08/21 10:00:07 10:00:09 -0.024 -0.0038 VT ROC
05/08/21 10:00:07 10:00:13 -0.025 -0.0036 Delta -
05/08/21 11:05:10 11:05:18 -0.027 -0.0029 Delta -
05/08/21 11:55:13 11:55:16 0.024 0.0044 VT ROC
05/08/21 11:55:14 11:55:21 0.028 0.0039 Delta +
05/08/21 12:37:53 12:37:59 0.024 0.0031 Delta +
05/08/21 12:58:28 12:58:32 -0.031 -0.0062 VT ROC
05/08/21 12:58:28 12:58:35 -0.031 -0.0052 Delta -
05/08/21 13:40:39 13:40:43 0.023 0.0027 Delta +
05/08/21 14:42:09 14:42:16 0.027 0.0032 Delta +
05/08/21 15:14:19 15:14:25 0.026 0.0032 Delta +
05/08/21 21:01:28 21:01:38 0.026 0.0029 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/09/21 01:26:14 01:26:20 0.025 0.0029 Delta +
05/09/21 02:01:05 02:01:09 -0.023 -0.0030 Delta -
05/09/21 04:00:06 04:00:09 -0.026 -0.0044 VT ROC
05/09/21 04:00:05 04:00:11 -0.026 -0.0040 Delta -
05/09/21 04:03:52 04:03:56 0.027 0.0042 VT ROC
05/09/21 04:03:51 04:03:59 0.028 0.0038 Delta +
05/09/21 06:27:49 06:27:50 0.030 0.0036 VT ROC
05/09/21 06:27:45 06:27:57 0.033 0.0037 Delta +
05/09/21 07:20:20 07:20:25 0.024 0.0030 Delta +
05/09/21 08:22:17 08:22:25 0.029 0.0034 Delta +
05/09/21 11:00:06 11:00:09 -0.027 -0.0040 VT ROC
05/09/21 11:00:04 11:00:12 -0.027 -0.0036 Delta -
05/09/21 12:10:07 12:10:11 -0.024 -0.0030 Delta -
05/09/21 14:32:53 14:32:58 0.024 0.0027 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/10/21 02:01:58 02:03:16 59.932   Under 59.940
05/10/21 02:11:29 02:11:41 0.029 0.0032 Delta +
05/10/21 03:07:11 03:07:19 -0.025 -0.0027 Delta -
05/10/21 03:50:07 03:50:10 -0.024 -0.0032 Delta -
05/10/21 09:05:10 09:05:14 0.027 0.0040 VT ROC
05/10/21 09:05:10 09:05:20 0.029 0.0038 Delta +
05/10/21 10:30:05 10:30:13 -0.029 -0.0035 Delta -
05/10/21 13:00:29 13:00:40 0.028 0.0034 Delta +
05/10/21 23:54:42 23:54:45 0.023 0.0028 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
05/11/21 01:34:42 01:34:47 0.024 0.0027 Delta +
05/11/21 02:02:01 02:02:08 -0.027 -0.0028 Delta -
05/11/21 02:11:56 02:12:04 0.026 0.0032 Delta +
05/11/21 04:53:35 04:53:39 0.024 0.0029 Delta +
05/11/21 05:45:17 05:45:21 0.024 0.0028 Delta +
05/11/21 07:57:41 07:57:49 0.028 0.0032 Delta +


PSFM Hardware and software by Robert M. Orndorff
Generated at 07:58:02 11-May-2021 UTC.
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