Fault-plane solution of the earthquake in Northern Italy, 6 May 1976, and implications for the tectonics of the Eastern Alps
Article Sidebar
Main Article Content
Abstract
The fault-plane solution of the North Italian earthquake of May 6, 1976, has been constructed from long-period records of 37 stations (mainly WWNSS stations), assuming a focus in the crust. It is essentially a thrust type solution, the compressional axis having an azimuth of about 160°, perpendicular to the strike direction of the Eastern Alps. One nodal plane is very well defined from first P-wave motions: it is steeply dipping approximately SSE with a dip angle of 77°. The second nodal plane has been determined from S-wave polarisations at stations in the United States and Japan: it dips roughly NW with a dip angle of about 16°. The dip direction of this nodal plane is less well defined. From the two possible interpretations of the fault-plane solution, either a shallow thrust of Italy under the Alps or a steep thrust of the Alps under Italy, only the first one is geologically plausible. The slip direction of the underthrusting block (or plate?) has an azimuth of 348° and a dip angle of 13°.
ARK: https://n2t.net/ark:/88439/y072059
Permalink: https://geophysicsjournal.com/article/280
Article Details
Authors who publish with this journal as of Vol. 63 agree to the following terms:
a. Authors share the copyright with this journal in equal parts (50% to the journal, 50% to the lead author), and grant the journal right of first publication, with the work after publication simultaneously licensed under Creative Commons Attribution License CC BY-NC-ND 4.0 that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
b. Authors may enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal, and a reference to this copyright notice.
c. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) during the submission process, as this can lead to productive exchanges and earlier and greater citation of published work and better sales of the copyright.
Author Self-archiving
Authors retain copyright and grant the Journal of Geophysics right of first publication, with the work three years after publication simultaneously licensed under the Creative Commons BY-NC-ND 4.0 License that allows others to share the work (with an acknowledgment of the work's authorship and initial publication in this journal), except for commercial purposes and for creating derivatives.
Authors can enter into separate, additional, but non-commercial contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository, but not publish it in a book), with an acknowledgment of its initial publication in this journal.
Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) before and during the submission process, as that can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
Additional Notes
This journal is one of a handful of scholarly journals that publish original scientific works under CC BY-NC-ND 4.0 - the only Creative Commons license affording the authors' intellectual property absolute worldwide protection.
Journal of Geophysics is published under the scholar-publishers model, meaning authors do not surrender their copyright to us. Instead, and unlike corporate publishers like Elsevier or Springer Nature that resell copyright to third-parties for up to $80,000 (per paper, per transaction!), the Journal of Geophysics authors share copyright equally with this journal.
Therefore, all the proceeds from reselling copyright to third parties get shared to equal parts (50% to the journal, 50% to the lead author). Under the Berne Convention, this protection is an inheritable right that lasts for as long as the rightsholder lives + 50 years.
By submitting to this journal, the lead author, on behalf of all co-authors, grants permission to this journal to represent all co-authors in negotiating copyright sales and collecting proceeds. The lead author should negotiate with his/her co-authors the modalities of distributing the lead author's portion of the proceeds. Usually, this is per pre-agreed percentage of each co-author's contribution to creating the copyrighted work. (more...)
References
Bonjer, K.-P. (1976) Evidence for the rotation of the azimuth of the principal stress axis with depth in the crust of the Rhinegraben area. To be submitted to J. Geophys.
Gutdeutsch, R., Arie, K. (1976) Erdbcben im ostalpinen Raum ~ Beobachtungsmethoden unt tektonische Deutungsversuche. Publikation Nr. 210. Zentralanstalt for Meteorologie und Geodynamik in Wien.
Jeanrichard, F. (1975) Summary of geodetic studies of recent crustal movements in Switzerland. Tectonophysics 29, 289-292
Martinis, B. (1975) The Friulian and Julian Alps and Pre-Alps. In: Ogniben, L., Parotto, M., Praturlon, A. (Eds.) Structural model of Italy, Consiglio Nazionale delle Ricerche, Roma
McKenzie, D.P. (1972) Active tectonics of the Mediterranean region. Geophys. J. 30, 109-185
Nuttli, O., Whitmore, J.D. (1962) On the determination of the polarisation angle of the S wave. Bull. Seism. Soc. Am. 52, 95-107
Schaer, J.P., Reimer, G.M., Wagner, G.A. (1975) Actual and ancient uplift rate in the Gotthard region, Swiss Alps: a comparison between precise levelling and fission track apatite age. Tectonophysics 29, 293-300
Schneider, G., Schick, R., Berckhemer, H. (1966) Fault-plane solutions of earthquakes in Baden-Wurttemberg. J. Geophys. 32, 383-393
Senftl, E., Exner, C. (1973) Rezente Hebung der Hohen Tauern und geologische Interpretation. Verh. Geol. Bundesanstalt Jg. 1973, 2, 209-234