گزارش زمین لرزه 8 خرداد ماه 1383 منطقه فیروزآباد- کجور
زمین لرزه 8 خرداد ماه 1383 منطقه فیروزآباد- کجور
براساس تحلیل لرزه‌نگاشت‌های ثبت شده در ایستگاههای باند پهن شبکه لرزه‌نگاری، پژوهشگاه بین‌المللی زلزله‌شناسی و مهندسی زلزله، زمین‌لرزه زیر بوقوع پیوست:
- زمان وقوع زلزله: ساعت 17:08 به وقت محلی
- محل وقوع: شمال غرب بلده به مختصات 51/64 درجه طول جغرافیایی و 36/37 درجه عرض جغرافیایی
- بزرگای: 6.3 =Ms امواج سطحی
- رویداد اصلی در منطقه بلده بلافاصله با پسلرزه‌های متعددی دنبال گردید که از میان بیش از 200 پسلرزه ثبت شده در شبکه لرزه‌نگاری باند پهن پژوهشگاه، تعداد حدود 75 پسلرزه که دارای بزرگای بیش از 2 بوده و با دقت خوبی تعیین محل شده‌اند، در شکل و جدول زیر نشان داده شده‌اند.
- سازوکار تعیین لرزه اصلی دلالت بر گسلش از نوع معکوس دارد که از مشخصه‌های غالب زمین‌لرزه‌ها در البرز مرکزی می‌باشد.
- معرفی گسل یا گسل‌های مسبب زمین‌لرزه اصلی 83/3/8 در منطقه بلده در حال حاضر با توجه به اطلاعات موجود امری دشوار به نظر می‌رسد. ولی با نگاهی به موقعیت گسل‌های البرز مرکزی، روند پسلرزه‌ها و بویژه سازوکار کانونی رویداد اصلی را می‌توان به یکی از گسل‌های تراستی با روند شمال غرب – جنوب شرق واقع در دامنه شمالی البرز نسبت داده شوند. در این میان فعالیت گسل‌های کجور و یا شمال البرز (شکل 2) بعنوان عامل ایجاد رویدادهای اخیر محتمل‌تر بنظر می‌رسد.
- بدیهی است شناسایی دقیق گسل مسبب زمین‌لرزه، تعیین ابعاد گسلش و سازوکار کانونی آن پس از بازگشت گروه شناسایی و بررسی‌های زمین‌شناسی و پردازش و تفاسیر داده‌های ثبت شده در شبکه لرزه‌نگاری محلی نصب شده در منطقه میسر خواهد بود.
جدول شماره 1: مشخصات زلزله اصلی و پسلرزه‌ها (Ms امواج سطحی، ML امواج محلی)
| DATE | TIME | LAT-N | LONG-E | DEPTH | mb | Ms | ML | REGION |
| 2004/07/22 | 02:05:32.4 | 36.51 | 51.54 | 28 | 2.9 | BALADEH | ||
| 2004/07/21 | 12:11:48.4 | 36.56 | 51.59 | 15 | 3.2 | BALADEH | ||
| 2004/07/18 | 13:44:19.0 | 36.53 | 51.44 | 28 | 2.8 | BALADEH | ||
| 2004/07/11 | 13:16:48.5 | 36.40 | 51.41 | 28 | 3.3 | BALADEH | ||
| 2004/07/03 | 06:43:31.2 | 36.45 | 51.41 | 15 | 2.9 | BALADEH | ||
| 2004/06/27 | 04:51:35.5 | 36.49 | 51.40 | 12 | 3.3 | BALADEH | ||
| 2004/06/24 | 02:36:28.6 | 36.47 | 51.42 | 28 | 2.8 | BALADEH | ||
| 2004/06/20 | 00:55:02.1 | 36.52 | 51.32 | 29 | 2.2 | BALADEH | ||
| 2004/06/19 | 01:54:41.0 | 36.58 | 51.54 | 28 | 2.4 | BALADEH | ||
| 2004/06/18 | 03:39:50.4 | 36.17 | 51.96 | 28 | 3.3 | BALADEH | ||
| 2004/06/17 | 21:48:19.8 | 36.44 | 51.64 | 28 | 2.3 | BALADEH | ||
| 2004/06/16 | 21:36:40.3 | 36.52 | 51.38 | 28 | 2.0 | BALADEH | ||
| 2004/06/16 | 06:53:26.5 | 36.41 | 51.59 | 28 | 2.4 | BALADEH | ||
| 2004/06/15 | 20:51:35.0 | 36.48 | 51.52 | 28 | 2.2 | BALADEH | ||
| 2004/06/15 | 20:31:43.9 | 36.46 | 51.65 | 28 | 2.2 | BALADEH | ||
| 2004/06/12 | 21:31:01.2 | 36.505 | 51.580 | 28 | 3.5 | BALADEH | ||
| 2004/06/12 | 06:43:42.0 | 36.445 | 51.517 | 28 | 3.3 | BALADEH | ||
| 2004/06/10 | 22:01:14.0 | 36.495 | 51.397 | 28 | 2.1 | BALADEH | ||
| 2004/06/10 | 06:27:23.0 | 36.418 | 51.703 | 28 | 2.7 | BALADEH | ||
| 2004/06/09 | 19:29:46.4 | 36.356 | 51.640 | 28 | 2.4 | BALADEH | ||
| 2004/06/09 | 08:27:03.6 | 36.403 | 51.515 | 28 | 2.8 | BALADEH | ||
| 2004/06/09 | 05:25:18.0 | 36.365 | 51.677 | 28 | 3.0 | BALADEH | ||
| 2004/06/09 | 02:07:33.3 | 36.499 | 51.553 | 28 | 2.3 | BALADEH | ||
| 2004/06/08 | 19:13:10.1 | 36.446 | 51.522 | 28 | 2.2 | BALADEH | ||
| 2004/06/08 | 10:46:24.5 | 36.482 | 51.512 | 28 | 2.7 | BALADEH | ||
| 2004/06/08 | 09:06:08.3 | 36.323 | 51.546 | 28 | 2.8 | BALADEH | ||
| 2004/06/08 | 04:34:36.3 | 36.475 | 51.383 | 28 | 2.5 | BALADEH | ||
| 2004/06/08 | 02:24:46.8 | 36.417 | 51.407 | 28 | 2.4 | BALADEH | ||
| 2004/06/07 | 23:11:59.7 | 36.439 | 51.402 | 28 | 2.2 | BALADEH | ||
| 2004/06/07 | 08:22:18.4 | 36.420 | 51.586 | 28 | 2.4 | BALADEH | ||
| 2004/06/07 | 04:01:23.0 | 36.411 | 51.506 | 28 | 3.9 | BALADEH | ||
| 2004/06/06 | 17:20:15.8 | 36.446 | 51.655 | 28 | 2.8 | BALADEH | ||
| 2004/06/06 | 06:08:21.2 | 36.443 | 51.415 | 28 | 2.8 | BALADEH | ||
| 2004/06/06 | 02:20:10.9 | 36.339 | 51.635 | 28 | 3.3 | BALADEH | ||
| 2004/06/05 | 23:22:38.7 | 36.550 | 51.547 | 28 | 2.3 | BALADEH | ||
| 2004/06/05 | 22:12:45.3 | 36.443 | 51.520 | 28 | 3.0 | BALADEH | ||
| 2004/06/05 | 20:58:14.3 | 36.421 | 51.439 | 28 | 3.2 | BALADEH | ||
| 2004/06/05 | 19:08:48.5 | 36.486 | 51.531 | 28 | 2.5 | BALADEH | ||
| 2004/06/05 | 00:10:45.3 | 36.408 | 51.401 | 28 | 2.8 | BALADEH | ||
| 2004/06/04 | 23:45:05.7 | 36.399 | 51.670 | 28 | 2.4 | BALADEH | ||
| 2004/06/04 | 14:30:31.1 | 36.543 | 51.537 | 45 | 2.8 | BALADEH | ||
| 2004/06/04 | 08:35:21.3 | 36.363 | 51.656 | 28 | 2.5 | BALADEH | ||
| 2004/06/04 | 08:18:53.2 | 36.367 | 51.555 | 28 | 2.4 | BALADEH | ||
| 2004/06/04 | 06:31:37.2 | 36.484 | 51.418 | 28 | 2.3 | BALADEH | ||
| 2004/06/03 | 20:15:25.6 | 36.452 | 51.645 | 28 | 2.8 | BALADEH | ||
| 2004/06/03 | 17:26:11.2 | 36.443 | 51.517 | 28 | 3.5 | BALADEH | ||
| 2004/06/03 | 07:37:27.0 | 36.449 | 51.651 | 28 | 2.5 | BALADEH | ||
| 2004/06/03 | 03:43:45.1 | 36.410 | 51.510 | 28 | 3.0 | BALADEH | ||
| 2004/06/02 | 20:41:19.6 | 36.496 | 51.511 | 28 | 3.1 | BALADEH | ||
| 2004/06/02 | 18:46:24.9 | 36.474 | 51.642 | 28 | 2.2 | BALADEH | ||
| 2004/06/02 | 11:12:25.6 | 36.506 | 51.410 | 28 | 3.0 | BALADEH | ||
| 2004/06/02 | 10:55:27.2 | 36.476 | 51.536 | 28 | 3.4 | BALADEH | ||
| 2004/06/02 | 07:27:32.3 | 36.410 | 51.621 | 6 | 3.5 | BALADEH | ||
| 2004/06/02 | 03:13:36.5 | 36.382 | 51.475 | 28 | 2.2 | BALADEH | ||
| 2004/06/01 | 23:38:09.7 | 36.410 | 51.429 | 28 | 2.0 | BALADEH | ||
| 2004/06/01 | 18:15:47.5 | 36.542 | 51.472 | 28 | 2.4 | BALADEH | ||
| 2004/06/01 | 16:28:34.1 | 36.397 | 51.638 | 33 | 3.2 | BALADEH | ||
| 2004/06/01 | 10:57:46.7 | 36.454 | 51.419 | 28 | 2.7 | BALADEH | ||
| 2004/06/01 | 09:33:15.3 | 36.431 | 51.647 | 28 | 3.5 | BALADEH | ||
| 2004/06/01 | 08:15:20.7 | 36.463 | 51.762 | 33 | 2.6 | BALADEH | ||
| 2004/06/01 | 06:22:01.7 | 36.396 | 51.451 | 28 | 2.6 | BALADEH | ||
| 2004/06/01 | 03:55:12.6 | 36.418 | 51.520 | 28 | 3.3 | BALADEH | ||
| 2004/06/01 | 03:22:26.2 | 36.389 | 51.718 | 28 | 3.2 | BALADEH | ||
| 2004/06/01 | 02:41:28.7 | 36.378 | 51.464 | 28 | 3.3 | BALADEH | ||
| 2004/06/01 | 00:35:32.6 | 36.456 | 51.497 | 28 | 3.2 | BALADEH | ||
| 2004/05/31 | 23:04:42.8 | 36.398 | 51.348 | 28 | 2.0 | BALADEH | ||
| 2004/05/31 | 22:27:01.8 | 36.300 | 51.449 | 15 | 2.2 | BALADEH | ||
| 2004/05/31 | 22:23:25.9 | 36.393 | 51.435 | 28 | 2.2 | BALADEH | ||
| 2004/05/31 | 22:05:34.6 | 36.542 | 51.670 | 12 | 3.3 | BALADEH | ||
| 2004/05/31 | 17:57:00.5 | 36.318 | 51.418 | 34 | 2.1 | BALADEH | ||
| 2004/05/31 | 08:12:16.7 | 36.463 | 51.264 | 14 | 3.7 | BALADEH | ||
| 2004/05/31 | 07:30:29.7 | 36.430 | 51.746 | 26 | 2.3 | BALADEH | ||
| 2004/05/31 | 03:43:38.1 | 36.320 | 51.638 | 15 | 2.4 | BALADEH | ||
| 2004/05/30 | 19:27:02.0 | 36.424 | 51.663 | 10 | 4.6 | BALADEH | ||
| 2004/05/30 | 18:03:19.0 | 36.449 | 51.452 | 28 | 2.7 | BALADEH | ||
| 2004/05/30 | 17:12:01.7 | 36.479 | 51.529 | 28 | 3.1 | BALADEH | ||
| 2004/05/30 | 16:18:24.6 | 36.268 | 51.442 | 28 | 3.2 | BALADEH | ||
| 2004/05/30 | 15:48:46.8 | 36.442 | 51.463 | 28 | 3.5 | BALADEH | ||
| 2004/05/30 | 13:09:55.6 | 36.415 | 51.455 | 28 | 4.0 | BALADEH | ||
| 2004/05/30 | 12:41:41.5 | 36.519 | 51.361 | 28 | 3.1 | BALADEH | ||
| 2004/05/30 | 11:49:02.3 | 36.360 | 51.367 | 28 | 2.8 | BALADEH | ||
| 2004/05/30 | 08:57:06.0 | 36.188 | 51.492 | 28 | 2.9 | BALADEH | ||
| 2004/05/30 | 07:48:53.1 | 36.464 | 51.382 | 28 | 3.5 | BALADEH | ||
| 2004/05/30 | 06:07:36.6 | 36.451 | 51.657 | 28 | 2.9 | BALADEH | ||
| 2004/05/30 | 02:41:27.7 | 36.461 | 51.450 | 28 | 3.6 | BALADEH | ||
| 2004/05/30 | 01:42:41.8 | 36.403 | 51.613 | 28 | 4.5 | BALADEH | ||
| 2004/05/30 | 00:05:17.4 | 36.238 | 51.511 | 7 | 2.7 | BALADEH | ||
| 2004/05/29 | 23:37:51.4 | 36.579 | 51.205 | 43 | 2.9 | BALADEH | ||
| 2004/05/29 | 23:05:46.8 | 36.487 | 51.361 | 28 | 2.6 | BALADEH | ||
| 2004/05/29 | 22:55:19.3 | 36.439 | 51.369 | 28 | 3.9 | BALADEH | ||
| 2004/05/29 | 19:58:19.7 | 36.465 | 51.455 | 28 | 3.5 | BALADEH | ||
| 2004/05/29 | 18:42:45.1 | 36.438 | 51.418 | 28 | 3.8 | BALADEH | ||
| 2004/05/29 | 18:38:07.9 | 36.451 | 51.376 | 28 | 4.6 | BALADEH | ||
| 2004/05/29 | 17:30:26.8 | 36.496 | 51.444 | 28 | 3.9 | BALADEH | ||
| 2004/05/29 | 15:41:03.6 | 36.469 | 51.420 | 28 | 3.9 | BALADEH | ||
| 2004/05/29 | 15:23:49.5 | 36.502 | 51.352 | 28 | 3.3 | BALADEH | ||
| 2004/05/29 | 15:03:49.6 | 36.509 | 51.416 | 28 | 3.2 | BALADEH | ||
| 2004/05/29 | 14:56:46.1 | 36.456 | 51.440 | 28 | 3.7 | BALADEH | ||
| 2004/05/29 | 13:34:24.6 | 36.390 | 51.390 | 28 | 3.3 | BALADEH | ||
| 2004/05/29 | 13:01:55.1 | 36.523 | 51.382 | 28 | 3.4 | BALADEH | ||
| 2004/05/29 | 12:56:43.7 | 36.507 | 51.424 | 28 | 3.6 | BALADEH | ||
| 2004/05/29 | 11:01:32.9 | 36.420 | 51.383 | 28 | 4.2 | BALADEH | ||
| 2004/05/29 | 10:20:40.0 | 36.374 | 51.413 | 28 | 3.6 | BALADEH | ||
| 2004/05/29 | 09:23:51.3 | 36.41 | 51.35 | 28 | 4.7 | BALADEH | ||
| 2004/05/29 | 06:34:14.0 | 36.436 | 51.439 | 28 | 3.2 | BALADEH | ||
| 2004/05/29 | 06:14:20.1 | 36.475 | 51.415 | 28 | 3.4 | BALADEH | ||
| 2004/05/29 | 05:34:50.5 | 36.444 | 51.433 | 28 | 2.8 | BALADEH | ||
| 2004/05/29 | 04:53:04.4 | 36.370 | 51.421 | 28 | 3.7 | BALADEH | ||
| 2004/05/29 | 04:12:35.6 | 36.413 | 51.708 | 28 | 3.9 | BALADEH | ||
| 2004/05/29 | 03:54:27.8 | 36.477 | 51.407 | 28 | 3.3 | BALADEH | ||
| 2004/05/29 | 03:35:23.6 | 36.415 | 51.746 | 28 | 3.5 | BALADEH | ||
| 2004/05/29 | 01:57:58.0 | 36.368 | 51.377 | 28 | 2.9 | BALADEH | ||
| 2004/05/29 | 01:09:57.4 | 36.510 | 51.397 | 9 | 2.8 | BALADEH | ||
| 2004/05/29 | 00:25:48.1 | 36.360 | 51.432 | 28 | 3.4 | BALADEH | ||
| 2004/05/28 | 23:53:57.3 | 36.389 | 51.705 | 28 | 3.1 | BALADEH | ||
| 2004/05/28 | 23:07:27.7 | 36.391 | 51.404 | 28 | 2.6 | BALADEH | ||
| 2004/05/28 | 22:50:37.7 | 36.439 | 51.383 | 28 | 2.4 | BALADEH | ||
| 2004/05/28 | 22:32:34.9 | 36.366 | 51.386 | 28 | 2.6 | BALADEH | ||
| 2004/05/28 | 21:31:25.6 | 36.413 | 51.676 | 28 | 3.1 | BALADEH | ||
| 2004/05/28 | 21:24:47.5 | 36.444 | 51.731 | 15 | 2.9 | BALADEH | ||
| 2004/05/28 | 21:22:48.5 | 36.372 | 51.426 | 28 | 2.5 | BALADEH | ||
| 2004/05/28 | 21:03:35.2 | 36.323 | 51.439 | 28 | 3.5 | BALADEH | ||
| 2004/05/28 | 20:49:25.9 | 36.451 | 51.379 | 28 | 2.8 | BALADEH | ||
| 2004/05/28 | 20:32:57.3 | 36.460 | 51.421 | 28 | 3.3 | BALADEH | ||
| 2004/05/28 | 20:31:20.8 | 36.419 | 51.406 | 28 | 3.2 | BALADEH | ||
| 2004/05/28 | 20:25:31.5 | 36.178 | 51.476 | 28 | 3.4 | BALADEH | ||
| 2004/05/28 | 20:16:55.6 | 36.519 | 51.365 | 28 | 2.7 | BALADEH | ||
| 2004/05/28 | 20:14:29.1 | 36.434 | 51.676 | 28 | 2.6 | BALADEH | ||
| 2004/05/28 | 20:09:18.1 | 36.411 | 51.373 | 28 | 3.1 | BALADEH | ||
| 2004/05/28 | 20:07:26.3 | 36.405 | 51.389 | 28 | 3.2 | BALADEH | ||
| 2004/05/28 | 19:47:05.6 | 36.368 | 51.448 | 28 | 4.8 | BALADEH | ||
| 2004/05/28 | 18:54:50.5 | 36.280 | 51.540 | 15 | 2.5 | BALADEH | ||
| 2004/05/28 | 18:46:36.6 | 36.274 | 51.530 | 15 | 2.3 | BALADEH | ||
| 2004/05/28 | 18:43:38.9 | 36.284 | 51.580 | 15 | 2.3 | BALADEH | ||
| 2004/05/28 | 18:33:13.2 | 36.364 | 51.595 | 15 | 2.7 | BALADEH | ||
| 2004/05/28 | 18:25:04.9 | 36.396 | 51.569 | 33 | 3.1 | BALADEH | ||
| 2004/05/28 | 18:10:19.7 | 36.364 | 51.593 | 15 | 2.3 | BALADEH | ||
| 2004/05/28 | 17:51:21.5 | 36.275 | 51.388 | 15 | 3.2 | BALADEH | ||
| 2004/05/28 | 17:34:51.3 | 36.485 | 51.361 | 22 | 3.3 | BALADEH | ||
| 2004/05/28 | 17:17:26.6 | 36.413 | 51.551 | 23 | 2.8 | BALADEH | ||
| 2004/05/28 | 16:45:21.5 | 36.260 | 51.460 | 28 | 2.8 | BALADEH | ||
| 2004/05/28 | 16:37:51.4 | 36.362 | 51.560 | 35 | 2.0 | BALADEH | ||
| 2004/05/28 | 15:35:05.0 | 36.455 | 51.494 | 28 | 2.4 | BALADEH | ||
| 2004/05/28 | 15:30:26.0 | 36.403 | 51.731 | 9 | 1.7 | BALADEH | ||
| 2004/05/28 | 15:20:49.8 | 36.392 | 51.531 | 28 | 2.6 | BALADEH | ||
| 2004/05/28 | 15:09:09.2 | 36.491 | 51.825 | 28 | 2.6 | BALADEH | ||
| 2004/05/28 | 15:01:18.3 | 36.458 | 51.588 | 26 | 2.5 | BALADEH | ||
| 2004/05/28 | 14:49:53.7 | 36.370 | 51.611 | 15 | 2.6 | BALADEH | ||
| 2004/05/28 | 14:47:51.3 | 36.493 | 51.373 | 10 | 2.8 | BALADEH | ||
| 2004/05/28 | 14:38:29.7 | 36.408 | 51.673 | 15 | 2.5 | BALADEH | ||
| 2004/05/28 | 14:28:27.7 | 36.372 | 51.706 | 28 | 3.0 | BALADEH | ||
| 2004/05/28 | 14:20:22.7 | 36.447 | 51.731 | 20 | 2.8 | BALADEH | ||
| 2004/05/28 | 13:35:56.0 | 36.397 | 51.613 | 28 | 4.4 | BALADEH | ||
| 2004/05/28 | 13:28:43.5 | 36.330 | 51.611 | 15 | 3.0 | BALADEH | ||
| 2004/05/28 | 13:26:28.8 | 36.406 | 51.781 | 15 | 2.9 | BALADEH | ||
| 2004/05/28 | 13:15:07.4 | 36.447 | 51.592 | 37 | 4.6 | BALADEH | ||
| 2004/05/28 | 13:07:11.2 | 36.339 | 51.670 | 28 | 3.9 | BALADEH | ||
| 2004/05/28 | 12:38:46.1 | 36.371 | 51.643 | 28 | 6.3 | BALADEH |
رکوردهای زلزله اصلی
