Eastern Interconnection Frequency Events

Generated by the PSFM-1 Frequency Recorder

(updated as events are recorded.)
All times are UTC.
Generated at 12:15:55 27-Jul-2021 UTC.

Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/01/21 08:59:41 08:59:43 0.031 0.0048 VT ROC
07/01/21 08:59:44 08:59:45 0.030 0.0038 VT ROC
07/01/21 08:59:39 08:59:48 0.032 0.0041 Delta +
07/01/21 11:40:19 11:40:21 0.022 0.0040 VT ROC
07/01/21 13:04:27 13:04:35 0.028 0.0036 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/02/21 09:00:24 09:00:29 0.031 0.0047 VT ROC
07/02/21 09:00:23 09:00:35 0.033 0.0043 Delta +
07/02/21 10:19:13 10:19:14 0.024 0.0042 VT ROC
07/02/21 10:19:12 10:19:20 0.026 0.0035 Delta +
07/02/21 11:34:23 11:34:28 0.024 0.0027 Delta +
07/02/21 11:45:14 11:45:19 0.025 0.0031 Delta +
07/02/21 12:07:13 12:07:14 0.022 0.0036 VT ROC
07/02/21 12:07:14 12:07:18 0.024 0.0032 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/03/21 08:13:15 08:13:15 0.024 0.0036 VT ROC
07/03/21 08:13:16 08:13:17 0.026 0.0036 VT ROC
07/03/21 08:13:15 08:13:20 0.027 0.0037 Delta +
07/03/21 13:10:46 13:10:50 0.023 0.0025 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/04/21 02:05:03 02:05:08 -0.024 -0.0028 Delta -
07/04/21 05:55:38 05:55:48 -0.029 -0.0033 Delta -
07/04/21 06:59:41 06:59:43 0.022 0.0040 VT ROC
07/04/21 12:02:36 12:02:37 0.024 0.0037 VT ROC
07/04/21 12:02:33 12:02:38 0.025 0.0031 Delta +
07/04/21 12:10:23 12:10:25 0.026 0.0042 VT ROC
07/04/21 12:10:22 12:10:31 0.030 0.0038 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/05/21 08:58:47 08:58:51 -0.024 -0.0027 Delta -
07/05/21 12:02:59 12:03:01 0.023 0.0036 VT ROC
07/05/21 12:02:59 12:03:03 0.024 0.0033 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/06/21 14:23:06 14:23:12 -0.025 -0.0029 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/08/21 09:15:39 09:15:43 0.027 0.0044 VT ROC
07/08/21 09:15:38 09:15:46 0.028 0.0041 Delta +
07/08/21 21:38:40 21:38:46 -0.025 -0.0032 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/09/21 01:54:38 01:54:44 -0.038 -0.0065 VT ROC
07/09/21 01:54:37 01:54:48 -0.039 -0.0057 Delta -
07/09/21 08:47:20 08:47:26 0.024 0.0025 Delta +
07/09/21 12:36:25 12:36:29 0.029 0.0045 VT ROC
07/09/21 12:36:25 12:36:35 0.030 0.0041 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/10/21 05:08:53 05:09:01 -0.025 -0.0032 Delta -
07/10/21 15:07:36 15:07:44 -0.028 -0.0032 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/11/21 04:35:11 04:35:16 -0.024 -0.0027 Delta -
07/11/21 12:12:54 12:12:56 0.027 0.0040 VT ROC
07/11/21 12:12:53 12:13:01 0.028 0.0036 Delta +
07/11/21 12:24:15 12:24:22 0.026 0.0031 Delta +
07/11/21 12:43:24 12:43:25 0.022 0.0036 VT ROC
07/11/21 12:43:24 12:43:31 0.026 0.0035 Delta +
07/11/21 13:48:13 13:48:17 0.023 0.0025 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/12/21 05:38:25 05:38:32 -0.051 -0.0100 VT ROC
07/12/21 05:38:24 05:38:35 -0.051 -0.0090 Delta -
07/12/21 05:44:55 05:45:03 0.036 0.0050 VT ROC
07/12/21 05:44:55 05:45:06 0.038 0.0049 Delta +
07/12/21 08:30:20 08:30:24 0.024 0.0032 Delta +
07/12/21 08:59:31 08:59:31 0.030 0.0036 VT ROC
07/12/21 08:59:26 08:59:36 0.031 0.0040 Delta +
07/12/21 10:41:50 10:41:57 0.028 0.0033 Delta +
07/12/21 11:00:05 11:00:11 -0.026 -0.0034 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/13/21 09:45:11 09:45:13 0.024 0.0044 VT ROC
07/13/21 09:45:09 09:45:16 0.025 0.0037 Delta +
07/13/21 10:15:10 10:15:12 0.029 0.0041 VT ROC
07/13/21 10:15:07 10:15:14 0.029 0.0037 Delta +
07/13/21 10:55:22 10:55:27 0.025 0.0032 Delta +
07/13/21 11:09:24 11:09:26 0.021 0.0037 VT ROC
07/13/21 11:09:25 11:09:32 0.026 0.0036 Delta +
07/13/21 13:53:26 13:53:30 0.024 0.0029 Delta +
07/13/21 15:25:48 15:25:52 0.024 0.0027 Delta +
07/13/21 20:54:38 20:54:43 -0.032 -0.0051 VT ROC
07/13/21 20:54:38 20:54:48 -0.033 -0.0045 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/14/21 11:40:17 11:40:24 0.024 0.0029 Delta +
07/14/21 12:00:26 12:00:29 0.024 0.0037 VT ROC
07/14/21 12:00:28 12:00:36 0.027 0.0036 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/15/21 11:00:06 11:00:09 -0.028 -0.0041 VT ROC
07/15/21 11:00:04 11:00:11 -0.028 -0.0037 Delta -
07/15/21 11:43:22 11:43:24 0.024 0.0042 VT ROC
07/15/21 11:43:25 11:43:27 0.029 0.0038 VT ROC
07/15/21 11:43:23 11:43:31 0.030 0.0038 Delta +
07/15/21 11:50:32 11:50:40 0.029 0.0033 Delta +
07/15/21 13:00:17 13:00:25 0.027 0.0034 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/16/21 05:00:06 05:00:14 -0.027 -0.0033 Delta -
07/16/21 06:42:08 06:42:13 0.026 0.0033 Delta +
07/16/21 10:50:21 10:50:28 0.032 0.0048 VT ROC
07/16/21 10:50:21 10:50:30 0.033 0.0047 Delta +
07/16/21 11:53:31 11:53:37 0.027 0.0030 Delta +
07/16/21 12:00:37 12:00:39 0.026 0.0038 VT ROC
07/16/21 12:00:33 12:00:43 0.028 0.0034 Delta +
07/16/21 12:45:13 12:45:17 0.026 0.0043 VT ROC
07/16/21 12:45:14 12:45:21 0.027 0.0039 Delta +
07/16/21 13:41:33 13:41:37 0.023 0.0027 Delta +
07/16/21 21:36:43 21:36:51 -0.029 -0.0044 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/17/21 05:00:32 05:00:36 -0.024 -0.0042 VT ROC
07/17/21 05:00:34 05:00:39 -0.025 -0.0041 Delta -
07/17/21 12:59:55 13:00:00 0.024 0.0031 Delta +
07/17/21 13:10:21 13:10:23 0.024 0.0041 VT ROC
07/17/21 13:10:21 13:10:28 0.026 0.0036 Delta +
07/17/21 13:15:26 13:15:28 0.025 0.0037 VT ROC
07/17/21 13:15:24 13:15:31 0.025 0.0035 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/18/21 02:29:40 02:29:44 -0.028 -0.0044 VT ROC
07/18/21 02:29:40 02:29:50 -0.029 -0.0041 Delta -
07/18/21 02:34:06 02:34:13 -0.026 -0.0032 Delta -
07/18/21 06:35:30 06:35:35 0.025 0.0032 Delta +
07/18/21 09:52:22 09:52:29 0.025 0.0028 Delta +
07/18/21 12:00:31 12:00:33 0.022 0.0043 VT ROC
07/18/21 12:15:17 12:15:20 0.024 0.0029 Delta +
07/18/21 12:18:06 12:18:10 -0.023 -0.0028 Delta -
07/18/21 13:54:42 13:54:47 0.033 0.0048 VT ROC
07/18/21 13:54:39 13:54:49 0.034 0.0044 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/19/21 02:01:00 02:01:07 -0.026 -0.0033 Delta -
07/19/21 02:05:01 02:06:08 59.935   Under 59.940
07/19/21 09:12:53 09:12:57 0.024 0.0031 Delta +
07/19/21 10:05:43 10:05:52 0.026 0.0031 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/20/21 10:49:58 10:50:04 0.026 0.0035 Delta +
07/20/21 21:12:00 21:12:04 -0.029 -0.0046 VT ROC
07/20/21 21:12:00 21:12:08 -0.031 -0.0042 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/21/21 11:00:12 11:00:14 0.020 0.0052 VT ROC
07/21/21 11:00:14 11:00:16 0.028 0.0042 VT ROC
07/21/21 11:00:13 11:00:20 0.030 0.0043 Delta +
07/21/21 11:45:16 11:45:19 0.027 0.0044 VT ROC
07/21/21 11:45:15 11:45:24 0.030 0.0039 Delta +
07/21/21 11:50:16 11:50:22 0.025 0.0028 Delta +
07/21/21 12:10:44 12:10:45 0.029 0.0041 VT ROC
07/21/21 12:10:42 12:10:52 0.031 0.0038 Delta +
07/21/21 20:41:09 20:41:13 -0.030 -0.0056 VT ROC
07/21/21 20:41:10 20:41:20 -0.036 -0.0048 Delta -
07/21/21 22:26:50 22:27:00 -0.048 -0.0075 VT ROC
07/21/21 22:26:50 22:27:03 -0.050 -0.0072 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/22/21 07:29:11 07:29:15 0.027 0.0038 VT ROC
07/22/21 07:29:11 07:29:18 0.027 0.0040 Delta +
07/22/21 13:20:06 13:20:10 -0.024 -0.0029 Delta -
07/22/21 13:59:08 13:59:14 0.025 0.0030 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/23/21 03:01:49 03:01:58 -0.026 -0.0029 Delta -
07/23/21 04:30:46 04:30:51 -0.024 -0.0025 Delta -
07/23/21 10:25:06 10:25:12 0.027 0.0031 Delta +
07/23/21 11:00:07 11:00:09 -0.022 -0.0040 VT ROC
07/23/21 11:02:17 11:02:21 0.023 0.0025 Delta +
07/23/21 15:22:31 15:22:35 0.024 0.0032 Delta +
07/23/21 17:56:55 17:57:06 -0.029 -0.0036 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/24/21 12:04:15 12:04:19 0.024 0.0029 Delta +
07/24/21 14:01:30 14:01:34 0.024 0.0029 Delta +


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/25/21 03:28:28 03:28:34 -0.024 -0.0027 Delta -
07/25/21 12:47:46 12:47:47 0.024 0.0036 VT ROC
07/25/21 12:47:45 12:47:51 0.025 0.0035 Delta +
07/25/21 13:15:47 13:15:52 0.032 0.0054 VT ROC
07/25/21 13:15:47 13:15:56 0.033 0.0051 Delta +
07/25/21 13:20:01 13:20:07 0.036 0.0057 VT ROC
07/25/21 13:20:00 13:20:12 0.038 0.0050 Delta +
07/25/21 20:15:25 20:15:30 -0.029 -0.0051 VT ROC
07/25/21 20:15:25 20:15:32 -0.030 -0.0045 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/26/21 11:55:11 11:55:13 0.021 0.0038 VT ROC
07/26/21 11:55:12 11:55:16 0.024 0.0036 Delta +
07/26/21 12:01:55 12:01:56 -0.024 -0.0040 VT ROC
07/26/21 12:01:54 12:02:00 -0.026 -0.0034 Delta -


Date Pickup Dropout Delta (Hz) Slope(Hz/sec) Type
07/27/21 11:12:41 11:12:45 0.024 0.0030 Delta +
07/27/21 12:15:36 12:15:44 0.026 0.0032 Delta +


PSFM Hardware and software by Robert M. Orndorff
Generated at 12:15:55 27-Jul-2021 UTC.
PSFM Home page