Puerto Rico Earthquakes 2019 - 2020
![Street scene old San Juan](Pictures/Old_San_Juan_street_scene.jpg)
A cobbled street
with colorful houses in the Old Town part of the city of San Juan.
![Historical R7s](Pictures/Puerto_Rico_Historical_R7s.jpg)
Richter
7.00 to 9.99 earthquakes - One in 1918; one in 1943 and the two
siblings from 1946 in the northwest. That is not much of a sample. Just
as well as Richter 7s are very dangerous.