Author: JOSÉ JORGE CARACHEO-GONZÁLEZ, MARINA MANEA, VLAD CONSTANTIN MANEA, IULIANA ARMAȘ

Abstract: Salt diapirs are geological formations that appear in the subsurface and are formed over
millions of years. Such formations occur due to the density difference between the salt and the
surrounding rock. The density difference causes the salt to penetrate throughout the strata and,
therefore, the salt rises to the surface in a process known as diapirism.
The importance of salt domes, structures that form because of diapirism, lies on the fact that due to
the impermeability of the salt and the deformation associated with the ascent of these structures, salt
domes become excellent oil traps, with important reserves. Therefore, it is important to know the
conditions that dominate the development of salt domes as well as their evolution and formation
environments.
If the subsurface is considered as a continuum and by means of the momentum equations, Newton's
second law and the heat conservation equation, in addition to an Eulerian approach to matter,
numerical models showing the evolution of salt domes can be created, and thanks to them, the
parameters that influence the formation of the domes can be calculated.
In this work it is concluded that some of the parameters that determine the formation and ascent of the
diapir are the width and height of the initial Gaussian anomaly, the viscosity of the salt, the
temperature, and the thickness of the salt layer.

Keywords: Diapirism, Prahova, Subcarpathians, Romania, Mexico..

entire article DOI 10.5719/GeoP.7/1

Author: FIDEL MARTÍNEZ-GARCÍA

Abstract: Contributing to the knowledge of the spatial distribution patterns involved in the most
seismic regions of the world is an alternative way of anticipating the destructive consequences
associated with significant earthquakes (>5.5Mw). This document provides evidence of the spatial
aggregation patterns that are implicated in the spatial distribution of 32,046 seismic events from 1980
to 2021 period, in the Pinotepa Nacional region, Oaxaca, Mexico (Middle America Trench) and its
relationship with intense local seismic activity and indirectly with possible hidden local unknown
structures, settled some kilometers below the surface. Using GIS tools, to identify spatial patterns, the
Local Indicators of Spatial Association analysis (LISA) and the Space–Univariate Local Moran's
Index (SULMI) were applied. The analysis revealed that 21.0% of the epicenter’s spatial distribution
is not random but tends to cluster toward seismicity potential zones. According to the LISA-SULMI
approach applied, for each significant earthquake greater than 5.5Mw, a map of color intensities was
obtained representing the degree of global spatial autocorrelation between the data. After a sequence
of two significant earthquakes in 2018 (7.6 - 6.0 Mw), a hidden local tectonic feature 43 kilometers in
diameter was revealed just 10 kilometers below the surface by micro-seismicity (2.0 and 2.9 Mw).

Keywords: Middle America Trench, Cocos Plate, LISA analysis, Moran's Index, spatial autocorrelation 1980-2021..

entire article DOI 10.5719/GeoP.7/2

Author: ANDRA-COSMINA ALBULESCU

Abstract: Scientific research is of critical importance for salient decision-making aiming to reduce
flood risk, but the interwoven character of risk-related terminology and the demanding task of
operationalising concepts like hazard and vulnerability frequently hinder scientific advancement. This
paper documents the i) meaning of the terms hazard and vulnerability, and ii) operationalisation of
these concepts, in the scientific research focusing on river floods in Romania. A 4-step semi-systematic
literature review was performed, setting the time frame to 2000-2022. The literature review points out
the conceptual and operational overlapping of the flood hazard and vulnerability, as well as their
dynamics and spatial focus. Flood hazard is operationalised mostly through hydraulic modelling and
spatial analysis, while flood vulnerability is frequently assessed via index-based methodologies.
There are several studies that operationalise flood vulnerability or hazard using a methodology that
targets flood risk. Another tendency observed in the literature is to choose titles referring to one of the
flood risk components, but to formulate aims that concern the other; in certain cases only to assess
their intersection. By addressing these issues, we aim to open the way to flood hazard and/or
vulnerability assessments that properly fit the terminological and methodological paradigms.

Keywords: flood hazard, flood vulnerability, risk terminology, Romania flood.

entire article DOI 10.5719/GeoP.7/3

Author: DANIELA DOBRE, IULIANA ARMAS

Abstract: Knowing how a crisis is perceived by a population can lead to more optimal and effective
measures to combat negative effects of disasters in this context, attitudes, the degree of involvement,
the speed of accepting imposed measures, play an important role for a preventive, pro-active
behaviour of both individual- and community-level. In this paper, based on the data provided by a
quantitative questionnaire applied in two non-sequential waves (177 responses in Wave 1 and 368
responses in Wave 5), some aspects of the five constructs expressing the types of perception towards
authorities, support, risk of illness, duration of the COVID-19 pandemic, media and some of the
factors that may influence perception (personality, cognitive-attitudinal, emotional, behavioural,
demographic aspects) are analysed.

Keywords: psychometric research, Covid-19 perception, behaviour, transversal method.

entire article DOI 10.5719/GeoP.7/4