<?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>0256-7024</journal-id>
<journal-title><![CDATA[Revista Geológica de América Central]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Geol. Amér. Central]]></abbrev-journal-title>
<issn>0256-7024</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0256-70242023000100001</article-id>
<article-id pub-id-type="doi">10.15517/rgac.v68i0.52521</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Uso del software Balística para analizar un caso del volcán Turrialba (Costa Rica)]]></article-title>
<article-title xml:lang="en"><![CDATA[Use of Balística software to analyze a case of the Turrialba volcano (Costa Rica)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Brenes-André]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Red Ciudadana de Estaciones Meteorológicas  ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<numero>68</numero>
<fpage>1</fpage>
<lpage>16</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0256-70242023000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0256-70242023000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0256-70242023000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Con la ayuda del software BALÍSTICA, desarrollado por el autor, fue posible analizar la posible trayectoria de un bloque balístico eyectado el 29 octubre del 2014, que impactó el puesto de guardaparques del volcán Turrialba, causando destrozos que pudieron ser mortales. En el análisis se pudo incorporar el concepto de que, en las primeras decenas de metros de recorrido, el fragmento fue arrastrado por la nube de gas y ceniza por lo que se mueve como un proyectil ideal. El resto del recorrido se supuso fue hecho en un régimen Newtoniano con coeficiente de arrastre Cd constante. Ambas etapas estuvieron afectadas por la asimetría del cráter. Bajo estas condiciones se calculó 125 ms-1 y 65° para la velocidad y ángulo de salida, de 83,3 ms-1 y 74,6° para la velocidad y ángulo de llegada, con un tiempo de vuelo 20,3 s (utilizando un Cd = 0,42 asociado a una semiesfera). Al final se incluyen unas recomendaciones generales sobre cómo construir los próximos refugios de manera que se reduzca el riego tanto de los guardaparques como de los visitantes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract BALLISTICA software, designed by the Author, was used to find a reasonable trajectory for the ballistic bombs and blocks ejected on October 29, 2014 from Turrialba volcano that hit the rangers quarters causing deadly damage, if it would have hit a person. The analysis included the proposal that the fragment was dragged by the ash and gas phase in the initial few hundred meters in its flight. The rest of the trajectory was analyzed as a ballistic path within a Newtonian regime acted with a constant drag coefficient of Cd. Both flight path stages were controlled by the crater asymmetry. It is proposed here an initial velocity and ejection angle of 125 ms-1 and 65° for the respectively, as well as 83,3 ms-1 and 74,6° for the corresponding final velocity and angle. A total flight time of a ballistically ejected clast of 20,3 s, calculated with Cd = 0,42 associated to a half-sphere. At the end, four general recommendations about building procedures were outlined to reduce possible future risk for both rangers and visitors in case of similar ballistic explosive eruption event.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[balístico]]></kwd>
<kwd lng="es"><![CDATA[arrastre]]></kwd>
<kwd lng="es"><![CDATA[régimen Newtoniano]]></kwd>
<kwd lng="es"><![CDATA[análisis del peligro]]></kwd>
<kwd lng="es"><![CDATA[volcán Turrialba]]></kwd>
<kwd lng="en"><![CDATA[ballistic]]></kwd>
<kwd lng="en"><![CDATA[drag]]></kwd>
<kwd lng="en"><![CDATA[Newtonian regime]]></kwd>
<kwd lng="en"><![CDATA[risk analysis]]></kwd>
<kwd lng="en"><![CDATA[Turrialba volcano]]></kwd>
</kwd-group>
</article-meta>
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