Analisis Percepatan Tanah Maksimum Wilayah Sumatera Barat (Studi Kasus Gempa Bumi 8 Maret 1977 dan 11 September 2014)

Authors

  • Marlisa Marlisa Jurusan Fisika Universitas Andalas
  • Dwi Pujiastuti Jurusan Fisika Universitas Andalas
  • Rachmad Billyanto Badan Meteorologi, Klimatologi dan Geofisika (BMKG), Padang Panjang

DOI:

https://doi.org/10.25077/jfu.5.1.53-58.2016

Abstract

Telah dilakukan penelitian tentang analisis percepatan tanah maksimum atau Peak Ground Acceleration (PGA) di wilayah Sumatera Barat akibat gempa bumi 8 Maret 1977 di Segmen Sumpur dan gempa bumi 11 September 204 di Segmen Sianok. Penelitian ini menggunakan metode McGuire. Hasil pengolahan data menghasilkan peta kontur PGA di wilayah Sumatera Barat. Nilai PGA terbesar akibat gempa bumi di Segmen Sumpur adalah 27,0 gal yang terjadi di daerah Pasaman. Gempa bumi di Segmen Sumpur merupakan gempa bumi berkategori merusak sedang dengan getaran yang dirasakan sangat kuat yaitu sebesar VII-VIII MMI (Mercali Modified Intensity). Nilai PGA terkecil adalah 1,1 gal yang terjadi di daerah Sijunjung, Dharmasraya, Pesisir Selatan, Kabupaten Solok, Solok Selatan, dan Kepualaun Mentawai. Efek gempa dirasakan  sebesar II-VI MMI  dengan kemampuan merusak berkategori ringan.  Nilai PGA terbesar akibat gempa bumi di Segmen Sianok adalah 28,0 gal yang terjadi di daerah Tanah Datar, Padang Panjang, Solok, Sawahlunto, dan Bukittinggi. Dampak gempa dirasakan sangat kuat  sebesar VII-VIII MMI dengan kemampuan merusak berkategori sedang. Nilai PGA terkecilnya adalah 1,1 gal yang terjadi di daerah Pasaman, Lima Puluh Kota, Pesisir Selatan, Sijunjung, Solok Selatan, Kabupaten Solok, Dharmasraya, dan Kepualaun Mentawai dengan intensitas II-VI MMI berkategori ringan.

Kata Kunci : Gempa bumi, grid, intensitas, metode McGuire, MMI, PGA, segmen Sianok, segmen Sumpur.

Downloads

Published

2016-01-01

How to Cite

Marlisa, M., Pujiastuti, D., & Billyanto, R. (2016). Analisis Percepatan Tanah Maksimum Wilayah Sumatera Barat (Studi Kasus Gempa Bumi 8 Maret 1977 dan 11 September 2014). Jurnal Fisika Unand, 5(1), 53–58. https://doi.org/10.25077/jfu.5.1.53-58.2016

Issue

Vol. 5 No. 1 (2016)

Section

Articles

License

Copyright (c) 2016 Marlisa Marlisa, Dwi Pujiastuti, Rachmad Billyanto

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Please find the rights and licenses in JFU (Jurnal Fisika Unand).

1. License

The non-commercial use of the article will be governed by the Creative Commons Attribution license as currently displayed on Creative Commons Attribution-NonCommercial 4.0 International License.

2. Authors Warranties

The author warrants that the article is original, written by stated author(s), has not been published before, contains no unlawful statements, does not infringe the rights of others, is subject to copyright that is vested exclusively in the author and free of any third party rights, and that any necessary written permissions to quote from other sources have been obtained by the author(s).

3. User Rights

JFU's spirit is to disseminate articles published are as free as possible. Under the Creative Commons license, JFU permits users to copy, distribute, display, and perform the work for non-commercial purposes only. Users will also need to attribute authors and JFU on distributing works in the journal.

4. Rights of Authors

Authors retain the following rights:

  • Copyright, and other proprietary rights relating to the article, such as patent rights,
  • The right to use the substance of the article in future own works, including lectures and books,
  • The right to reproduce the article for own purposes, provided the copies are not offered for sale,
  • The right to self-archive the article.

5. Co-Authorship

If the article was jointly prepared by other authors, the signatory of this form warrants that he/she has been authorized by all co-authors to sign this agreement on their behalf, and agrees to inform his/her co-authors of the terms of this agreement.

6. Termination

This agreement can be terminated by the author or JFU upon two months notice where the other party has materially breached this agreement and failed to remedy such breach within a month of being given the terminating partys notice requesting such breach to be remedied. No breach or violation of this agreement will cause this agreement or any license granted in it to terminate automatically or affect the definition of JFU.

7. Royalties

This agreement entitles the author to no royalties or other fees. To such extent as legally permissible, the author waives his or her right to collect royalties relative to the article in respect of any use of the article by JFU or its sublicensee.

8. Miscellaneous

JFU will publish the article (or have it published) in the journal if the articles editorial process is successfully completed and JFU or its sublicensee has become obligated to have the article published. JFU may conform the article to a style of punctuation, spelling, capitalization, referencing and usage that it deems appropriate. The author acknowledges that the article may be published so that it will be publicly accessible and such access will be free of charge for the readers.