<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0016-7169</journal-id>
<journal-title><![CDATA[Geofísica internacional]]></journal-title>
<abbrev-journal-title><![CDATA[Geofís. Intl]]></abbrev-journal-title>
<issn>0016-7169</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geofísica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-71692023000100419</article-id>
<article-id pub-id-type="doi">10.22201/igeof.2954436xe.2023.62.1.1449</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura del subsuelo de la Sabana de Bogotá. Análisis de dispersión de ondas superficiales a partir de sismos y ruido sísmicos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez-García]]></surname>
<given-names><![CDATA[Francisco José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monsalve-Jaramillo]]></surname>
<given-names><![CDATA[Hugo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vila-Ortega]]></surname>
<given-names><![CDATA[Joaquín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Ingeniería Coordinación de Ingeniería Sismológica]]></institution>
<addr-line><![CDATA[Ciudad Universitaria CDMX]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Quindío Centro de Estudios e Investigaciones de la Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Armenia Quindío]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad del Quindío Centro de Estudios e Investigaciones de la Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Armenia Quindío]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<volume>62</volume>
<numero>1</numero>
<fpage>419</fpage>
<lpage>428</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-71692023000100419&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-71692023000100419&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-71692023000100419&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se presentan resultados del análisis de componentes verticales de registros de sismos y ruido sísmico en la Sabana de Bogotá con el objetivo de explorar la estructura del subsuelo. En el caso de los registros de sismos, se analizaron directamente las ondas de Rayleigh presentes en los registros para estimar velocidades de grupo. Para los registros de ruido sísmico utilizamos el método de interferometría sísmica que permite estimar funciones de Green a partir de la correlación cruzada. El promedio de esas correlaciones cruzadas permitió recuperar pulsos de ondas Rayleigh entre pares de estaciones. En todos los casos estimamos curvas de dispersión de velocidad de grupo. Los resultados muestran el impacto de la geología en los valores de velocidad de grupo en la región de estudio. Observamos diferencias entre trayectorias contenidas en los sedimentos cuaternarios que cubren la Sabana de Bogotá y aquellas que incluyen parte de su trayecto por rocas del Cretácico. El contraste de impedancia estimado entre los sedimentos superficiales y los estratos subyacentes sugiere que la amplificación del movimiento sísmico excede un factor de 10. La deficiente cantidad y calidad de los datos limitaron los alcances del este trabajo. Los rangos de frecuencia de los resultados no coincidieron para las distintas fuentes de datos, lo que obstaculizó las comparaciones entre trayectorias. A pesar de esas limitaciones, estos resultados contribuyen a mostrar la relevancia de los efectos de sitio en la Sabana de Bogotá y la necesidad de tomarlos en cuenta para estimar el movimiento durante sismos futuros en esta zona.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We present the results of the analysis of vertical component from earthquake and seismic noise records obtained in the Sabana de Bogotá to determine subsoil structure in that region. Rayleigh waves present in the earthquake data were processed to estimate to estimate group velocities. In the case of seismic noise, we used seismic interferometry to estimate Green&#8217;s functions between stations from average cross-correlation. Rayleigh wave pulses were recovered between stations from seismic noise. We processed the results to estimate group velocities in all cases. The results show the impact of geology on group velocities in the studied region. Different station pairs show varying group velocities depending on the age of the rocks along the paths. Our estimated impedance contrast between surficial deposits and underlying bedrock suggests possible amplification of ground motion larger than a factor of 10. The poor quality and the limited quantity of our data limited the comprehensiveness of our results. The frequency ranges of the results showed poor overlap, hindering comparisons among paths. In spite of their limitations, our results highlight the importance of site effects in the Sabana de Bogotá and the need to take them into account to estimate ground motion for future events in that region.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Correlación cruzada]]></kwd>
<kwd lng="es"><![CDATA[Ondas de Rayleigh]]></kwd>
<kwd lng="es"><![CDATA[Dispersión de velocidad de grupo]]></kwd>
<kwd lng="es"><![CDATA[Efectos de sitio.]]></kwd>
<kwd lng="en"><![CDATA[Cross-correlation]]></kwd>
<kwd lng="en"><![CDATA[Rayleigh waves]]></kwd>
<kwd lng="en"><![CDATA[Group velocity dispersion]]></kwd>
<kwd lng="en"><![CDATA[Site effects]]></kwd>
</kwd-group>
</article-meta>
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