Earthquakes near San Pedro de Macorís, 1927–2026

It was also the deadliest: NOAA records 1,790 deaths for it. 5 earthquakes here in these years are on NOAA’s list of significant earthquakes. NOAA records deaths in 3 of the events here, 1,870 in all. The ten years with the most magnitude 6+ earthquakes were 1937–1946, with 5 of the 10. The latest on NOAA’s list is a magnitude 4.4 on November 1, 1989 (Mona Passage). NOAA lists 2 tsunamis that began within 100 km of San Pedro de Macorís, and one from elsewhere that reached it with deaths or a metre of water or more. The highest of them reached 5 m, on August 4, 1946. The deadliest here came on August 8, 1946 from a magnitude 7.5 earthquake (Northeastern Coast): NOAA’s runup records count 75 deaths within 100 km of San Pedro de Macorís.

• November 1, 1989Earthquake · M 4.4Mona PassageNOAA NCEI
• April 21, 1948Earthquake · M 7.111 km WNW of Sánchez, Dominican RepublicUSGS
• August 8, 1946Tsunami · 0.6 m highNortheastern Coast · 75 deaths here (NOAA)NOAA NCEI
• August 4, 1946Earthquake · M 7.816 km NNW of Miches, Dominican Republic · 1,790 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• August 4, 1946Tsunami · 5 m highNortheastern CoastNOAA NCEI · Wikipedia

• An event counts for San Pedro de Macorís when it began within 100 km of its centre, or 200 km for an earthquake of magnitude 7 or more. Damage can reach further.
• USGS counts here start at magnitude 6: the catalogue’s smaller quakes thin out going back, where few instruments listened.
• NOAA lists significant events only: earthquakes that killed, did about $1 million of damage, reached magnitude 7.5 or intensity X, or raised a tsunami, and eruptions and tsunamis by like measures. Magnitudes before 1900 are its estimates from written accounts.
• Deaths are NOAA’s total for each event, wherever people died, its tsunami and fires included. A tsunami counts the dead its runup records give for this place: NOAA’s total for a tsunami includes its source quake’s.
• A tsunami from elsewhere counts where one of its runups killed or rose a metre or more.
• Counted to October 19, 2026, as is the map. The last 30 days ask USGS again.

How the layers work, where their data comes from and what they can’t tell you: Earthquakes, live, The world through history