Lisbon Earthquake of 1 November 1755

Authors

  • S. M. MUKHERJEE

DOI:

https://doi.org/10.54302/mausam.v6i2.4431

Keywords:

Earthquake, Lisbon, Isolated seiches

Abstract

Available data on the Lisbon earthquake have been reviewed. Some new aspects of the earthquake have been brought out and a few others reinterpreted in the light of data of the recent Assam earthquake. The fresh calculations made show that this Lisbon earthquake may be considered as the strongest of all shooks for which scientific data are available. The magnitude of the earthquake has been approximately determined as 8.7 and energy between 1017 ergs and 7 X 1017 ergs or double the energy of the Assam earthquake of 1950 with depth of focus 18 km.

Seiches appear to be associated with shallow earthquakes of magnitude exceeding 8.5. True seiches are generally observed over the region just o11tside the felt area. The shook may be felt and hanging objects may oscillate the energies of the shocks. Isolated seiches may occur at very large distances, say, even 4000 or 5000 miles, from .the epicentre.

 

Downloads

Published

01-04-1955

How to Cite

[1]
S. M. . MUKHERJEE, “Lisbon Earthquake of 1 November 1755”, MAUSAM, vol. 6, no. 2, pp. 149–158, Apr. 1955.

Issue

Vol. 6 No. 2 (1955): MAUSAM

Section

Research Papers

License

Copyright (c) 2021 MAUSAM

Creative Commons License

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

All articles published by MAUSAM are licensed under the Creative Commons Attribution 4.0 International License. This permits anyone.

Anyone is free:

  • To Share - to copy, distribute and transmit the work
  • To Remix - to adapt the work.

Under the following conditions:

  • Share - copy and redistribute the material in any medium or format
  • Adapt - remix, transform, and build upon the material for any purpose, even
    commercially.