Tektites have been found in the Beloc Formation, Haiti, which are thought to have originated from the asteroid impact in Yucatán Peninsula, Mexico, which caused the K-Pg mass extinction event 66 million years ago. The presence of picrite in the Duarte Complex in central Hispaniola and enriched basalts in southern Haiti are thought to be indicative of earlier hotspot activity There are two Pleistocene volcanoes in Haiti, the nepheline basalt scoria cones of Morne la Vigie, north of Port au Prince, and Thomazeau, east north east of Port-au-Prince, both of which were active around 1.5 million years ago and, three in the Dominican Republic, the basaltic cinder cones of San Juan, trachyandesite lava domes and flows of the Dos Hermanos volcanic field and the rhyolitic to basalt Valle Nuevo volcanic field. While the island has a volcanic past, there has not been any reported volcanic activity in the Holocene. The country is poor, politically unstable and yet to recover from the 2010 earthquake. Haiti has an estimated population of 11.4 million (2018). Hispaniola was formed from the collision of volcanic arcs with the North American Plate the island is made up of 11 former island arcs. We have updated our earthquake plots to this morning, 7 th July 2023 09:37 using the published earthquakes from .į ig 2: Cropped image from one digitally altered by Mikenorton of the Gonâve Microplate (plate boundaries, main faults, islands and plates were added). These represent fault movements/earthquakes that were triggered during the dike propagation.”
Several small lineaments are also visible in the interferogram which cut across the fringes. There is no indication of additional magma movements outside this area. The magma intrusion is situated bewteen Fagradalsfjall and Keilir. The maximum observed deformation related to the dike intrusion is up to 18 cm in the satellite‘s line-of-sight (los) in the NW direction.Īlthough the deformation signal extends over a large area of the western Reykjanes Peninsula, this does not mean there is magma beneath this entire region.
These fringes show ground deformation caused by the new dike intrusion which commenced on 4 July 2023.
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The wrapped image (Fig 2) clearly shows a series of multicolored fringes centered bewtween Fagradalsfjall and Keilir. See main text for attribution and description.įrom IMO, Earthquake activity in Fagradalsfjall area | News | Icelandic Meteorological office (vedur.is), “ COSMO-SkyMed interferogram covering the period 28 June to 6 July 2023. Fig 2: InSAR image confirming dike intrusion.
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