Puerto Rico Earthquakes 2019 - 2020
Puerto Rico has 13 active airports and four closed airports. By far, the most active is Luis Munoz Marin International Airport (SJU) near San Juan: it handles more than four million passengers per year and acts as a hub for smaller airlines connecting to other islands. SJU was significantly damaged by Hurricane Maria and it is virtually impossible to replace. More ruggedization of terminals, plane storage areas and electrical systems should be attended to. Runways and access roads are especially vulnerable during earthquakes so repair and paving machinery needs to be ready to go. Similar coverage for airports such as Rafael Hernandez International (BQN) near Aquadilla and Mercedita International (PSE) near Ponce should be considered as well. Airports are usually the primary access point for emergency supplies and rescue teams - especially when the target area is an island like Puerto Rico. There is usually also quite a crush of tourists trying to get home away from chaos as quickly as possible.
As important as airports are, bulk materials have to arrive by sea. One problem in Haiti in 2010 was that the only container crane (see below) was damaged.

Port-au-Prince harbor 2010
In a manner similar to airports, the access roads for trucks and truckdrivers are critical. I am unable to locate current cargo statistics for Puerto Rico - the data on World Ports, for example, is from 2015. At that time, there were 1.6 million TEUs shipped through the Port of San Juan. In terms of dollars the imports and exports in 2015 (millions of dollars) looked like

Port Imports Exports
Aguadilla 16 92
Fajardo 109 75
Guanica 1 0
Guayanilla 1295 5
Jobos Bay 123 0
Mayaguez 15 46
Playa de Humacao 624 25
Ponce 383 55
San Juan 5955 4727
     
TOTAL 8521 5025
     
San Juan percentage 70% 94%
 
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 Recommendations - Airports and seaports

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