Abstract

SALCEDO-HURTADO, Elkin de Jesús; BLANDON-SILVA, Juan Camilo  and  RIOS-GARCIA, Luisa. Re-assessment of macroseismic intensities of the earthquake of June 7, 1925 in Colombia. Bol. geol. [online]. 2021, vol.43, n.3, pp.35-61.  Epub Mar 29, 2022. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v43n3-2021002.

The earthquake occurred on June 07 of 1925 is an event felt in several regions of Colombia, the harshness of its effects was quite considerable. Many authors have carried out research that contributes to improving the knowledge of this seismic event. The hypotheses of intensities that were given in previous works are contrasted in this one, showing the dissimilarity in the use of macroseismic scales and the lack of correlation in the assigned macroseismic intensity values. The finding of new historical accounts on the earthquake reflects on the increasing number of inhabitants affected by this earthquake, as well as on improving the information about the damages and effects shown in other populations; therefore, the information quality is improved in order to propose new more precise intensity values, which also fill empty geographical gaps. The macroseismic data has been evaluated in the EMS-98 scale. The geographic distribution of the intensity points highlights a slightly SSW-NNE trend, where the highest intensities are assigned to settlements in department of Valle del Cauca, with values ranging from V to VIII, being the highest intensity reported in Cali city. From this, the decay of the intensity is appreciated on both directions, towards the NNE and the SSW, with greater elongation towards the NNE. The macroseismic epicenter is located at the coordinates latitude 3.45° North and longitude 76.49° West.

Keywords : Macroseismic dates; Macroseismic intensity; EM-98 scale; Isoseismals map.

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