Editing Tagus (section)

=== Geology ===
The lower Tagus region in Portugal is a seismically active area. Major [[earthquake]]s in the Lower Tagus include those of 1309, [[1531 Lisbon earthquake|1531]], [[1755 Lisbon earthquake| 1755]], and [[1909 Benavente earthquake|1909]].<ref>{{cite book|first=William Herbert|last=Hobbs|author-link=William Herbert Hobbs|title=Earthquakes: An Introduction to Seismic Geology|publisher=D. Appleton and Company|location=New York|year=1907|pages=142–144}} [https://archive.org/details/earthquakesanin00hobbgoog/page/n200 <!-- pg=142 quote=Tagus. --> Downloadable Internet Archive]</ref><ref name="Diário de Notícias">{{cite web |title=Sismo sentido em Lisboa na mesma zona dos grandes abalos de 1531 e 1909|trans-title=Earthquake felt in Lisbon in the same area as the great earthquakes of 1531 and 1909 |url=https://www.dn.pt/sociedade/sismo-sentido-em-lisboa-ocorreu-na-mesma-zona-dos-grandes-abalos-de-1531-e-1909--13472236.html |publisher=[[Diário de Notícias]] |access-date=29 October 2021 |language=Portuguese |date=18 March 2021}}</ref>