A map <a rel="nofollow" class="external text" href="https://neic.usgs.gov/neis/eq_depot/world/1755_11_01_loc.gif">from the USGS</a> showing the location of the 1755 Lisbon earthquake
USGS
USGS <a rel="nofollow" class="external free" href="https://neic.usgs.gov/neis/eq_depot/world/1755_11_01_loc.gif">http://neic.usgs.gov/neis/eq_depot/world/1755_11_01_loc.gif</a> archived at <a rel="nofollow" class="external free" href="https://web.archive.org/web/20061124075317/http://neic.usgs.gov/neis/eq_depot/world/1755_11_01_loc.gif">https://web.archive.org/web/20061124075317/http://neic.usgs.gov/neis/eq_depot/world/1755_11_01_loc.gif</a>