Seismotectonic Map of Cuba (Original Scale 1:1,000,000)

Contexts in source publication

Context 1

... is an historic place with a limited touristic profile (Girón Beach and Larga Beach). The earthquake above mentioned was registered in an intraplate zone, concretely in the Western Seismotectonic Unit (Wsu) (Figure 2). The first earthquakes reported there occurred in 1693 (Ciudad de La Ha- bana) and 1777 (Güines) (Figure 1), but it had several perceptible earth- quakes (Table 1). ...

Context 2

... recent earthquake of ZS-CHB confirm principally: 1) the great differences in the reports by the international seismic networks and the Cuban seismic stations (Table 3). The first group get epicentral parame- ter values very near between them, and the second one (Cuban network) situated the epicenter more far to the E; 2) the seismic activity [SA] in the surrounding of CHB-JG (Cotilla, 1999A; Cotilla, 2014B); 3) the low energetic level of this area (Cotilla and Álvarez, 2001) (Figure 2); 4) the validity of the geodynamic cells model to explain the earthquakes occur- rence (Cotilla et al., 1996A) ( Figure 3A). ...

Context 3

... events in the Gulf of Mexico and the Bahamas regions (Table 10) are related to some of these structures (Cotilla, 1993;2012;2016;Cotilla and Franzke, 1999). Note: GM= Geodynamic model (see Figure 3A); SM= Seismotectonic map (see Figure 2). ...

Context 4

... dynamic interaction between the Caribbean and North Ameri- can plates is very well reflected in the SA of the Cuban territory (Cotilla, 1993;1998A;2014C). This was one of the arguments used for the differ- entiation of the Cuban Seismotectonic Province into 4 Units (Southeastern [Ssu], Eastern [Esu], Center [Csu] and [Wsu] and to identify 4 main ac- tive knots (KNPR0, KNMG0, KNMG1 and KNMN1) (Figure 2) (Cotilla, 2014C;). The knots KNMG0 and KNMG1 are in the contact zone [Ssu] of the plates mentioned before through the Oriente fault [OF], where the strongest and most frequent earthquakes take place (Table 12). ...

Context 5

... Bay, Cuba Figure 2). ...

Context 6

... has 2 seismoactive knots (KNMGO and KNMN1) at its ends. They connect: 1) OF with CNF in the SW, near to the locality of Cabo Cruz; 2) Nortecubana fault [NCF] with CNF in the NE to the north of Nipe Bay, respectively (Figure 2). The largest level of SA is associated with OF (of 1 st order). ...

Context 7

... Cuban megablock. It has a coefficient of sinuosity (ks) value of: 1) 0.74 in the Cabo de San Antonio -Hicacos Penynsula (Varadero) segment (NE strike); 2) 0.94 between Hicacos and Punta de Maisí segment (NW strike) (Cotilla and Udías, 1999A) (Figure 2). These values and strikes indicate the concave figure of this fault that we determined in other structures as the Yucatán Basin (Figure 4). ...

Context 8

... was mainly exem- plified with two earthquakes: 1) 19.02.1976 (Ms= 5.7) in Pilón, Ssu; 2) 16.12.1982 (Ms= 5.0) in Torriente-JG, Wsu (Figure 2). It is well known that the seismic devices and the development of software's have improve- ment of the accurracy determinations. ...

Context 9

... La Trocha-Nipe) (Figure 2). But, according to the strike and setup of the NCF three segments are determined: 1) West= NC1F (Cabo de San Antonio-Hicacos Penynsula); 2) Center= NC2F (Hicacos Penynsula-Nipe Bay); 3) East= NC3F (Nipe Bay-Punta de Maisí). ...

Context 10

... length of each seg- ment is different, being the shortest, the third structure that is the closest to the PBZ (NC3F), and very near to Bahamas Platform and the Atlantic Ocean. Here is joint in the knot KNMG1 with the OF and the Septentrion- al fault (N of Hispaniola) (Figure 2). The other two segments have some differences. ...

Context 11

... cells are made up of the following active faults: CHF, GF, HF, HCF, NCF and SCF. The majority of faults was linked to earthquakes ( Figure 2 and Table 9). We also found 8 knots where the fault intersections are located or associat- ed with some earthquakes (Table 14). ...

Context 12

... both extremes (NW and SE) are the La Habana Bay (K5) and Cienfuegos Bay (K1), respectively. The mentioned before 1982 earth- quake that hit Torriente-JG localities (Figures 2 and 3, Tables 2 and 9) is associated at the intersection of HCF with CHF (knot K2 ...

Context 13

... and Álvarez (2001) (see their Figure 7) suggested to the Wsu that 4 pairs of faults (1) GF and HCF; 2) HF and HCF; 3) HF and NCF; 5) HCF and CHF) are interconnected active structures. Also, the strike, geometry and activity of these faults can be explained by the presence of 2 large depressed oceanic structures, the Gulf of México and the Yucatán Basin (Figure 2), which are opposed in the contemporary tectonic stress field, mainly caused by the Caribbean, Cocos and North American plates interactions. There is a similar explanation to the SA in the Eastern Gulf of México. ...

Context 14

... northern Cuban (Cárdenas-Corralillo-Sagua la Grande) limit with the CHB-JG area. It has a very well defined spatial relationship with the seismogen- ic zone of Las Villas fault (3 rd order) (Figure 2). This structure is parallel to the NC2F and it shows SA in Cárdenas, Corralillo, Sagua La Grande and Remedios. ...

Context 15

... the proposals by Cotilla and Franzke (1999), Cotilla and Udías (1999A) and Cotilla et al. (1996B;1997B;) the stress transmis- sion is easier northward in the Remedios-Caibarién-Gibara (NC2F) seg- ment than in the Cabo de San Antonio-Hicacos Penynsula (NC1F) ( Figure 2). These two segments also belong to the Wsu and they are related to strong earthquakes. ...