A magnitude 5.2 earthquake occurred at 05:45:50 UTC on 23 September 2018, (01:45:50 local time), at 3.3 km (2.0 mi) NW of Villa Elisa, Dominican Republic; 28.2 km (17.5 mi) NW of Mao, Dominican Republic and 26.0 km (16.2 mi) NNE of Sabaneta, Dominican Republic.

Isaac was the fifth tropical cyclone that reached the hurricane category in the 2018 Atlantic Hurricane Season. It formed as a tropical depression over the eastern tropical Atlantic Ocean on 7 September 2018 at 2100UTC. Thereafter it strengthened, becoming a tropical storm on 8 September at 2100UTC and a hurricane on 10 September at 0300UTC.

A magnitude 7.3 earthquake occurred at 21:31:46 UTC on 21 August 2018, (19:31:46 local time), at 45.7 km (28.4 mi) ENE of Carúpano, Venezuela; 108.5 km (67.4 mi) E of Porlamar, Venezuela and 71.0 km (44.1 mi) WNW of Güiria, Venezuela.

A magnitude 5.3 earthquake occurred at 20:42:03 UTC on 27 July 2018, (14:42:03 local time), at 64.6 km (40.1 mi) SSW of Intipucá, El Salvador; 83.3 km (51.8 mi) SSE of Puerto El Triunfo, El Salvador and 85.5 km (53.1 mi) SSE of Usulután, El Salvador.

Beryl was the first tropical cyclone that reached the hurricane category in the 2018 Atlantic Hurricane Season. It formed as a tropical depression in the Atlantic Ocean on 5 July 2018 at 1500UTC and it became a tropical storm on 5 July at 1830UTC. It reached a hurricane category 1 on 6 July at 0900UTC and kept this intensity until 7 July at 1500UTC, when it was downgraded to a tropical storm. Just before making landfall on the Leeward Islands, the system became an open trough.

Beryl was the first tropical cyclone that reached the hurricane category in the 2018 Atlantic Hurricane Season. It formed as a tropical depression in the Atlantic Ocean on 5 July 2018 at 1500UTC and it became a tropical storm on 5 July at 1830UTC. It reached a hurricane category 1 on 6 July at 0900UTC and kept this intensity until 7 July at 1500UTC, when it was downgraded to a tropical storm. Just before making landfall on the Leeward Islands, the system became an open trough.

A magnitude 5.2 earthquake occurred at 12:37:58 UTC on 6 May 2018, (06:37:58 local time), at 4.6 km (2.8 mi) ENE of Intipucá, El Salvador; 23.3 km (14.5 mi) SW of La Unión, El Salvador and 35.5 km (22.1 mi) SSE of San Miguel, El Salvador.

A magnitude 5.8 earthquake occurred at 15:03:54 UTC on 16 January 2018, (09:03:54 local time), 61.2 km (38.0 mi) SW of San Juan del Sur, Nicaragua; 77.9 km (48.4 mi) SW of Rivas, Nicaragua and 100.7 km (62.6 mi) S of San Rafael del Sur, Nicaragua.

A magnitude 5.9 earthquake occurred at 15:03:54 UTC on 16 January 2018 (09:03:54 local time), 62.6 km (38.9 mi) SW of San Juan del Sur, Nicaragua; 79.3 km (49.3 mi) SW of Rivas, Nicaragua and 101.3 km (62.9 mi) S of San Rafael del Sur, Nicaragua.