Geomagnetic anomalies observed at volcano Popocatepetl, Mexico

Kotsarenko, A.; Grimalsky, V.; Pérez-Enríquez, R.; Yutsis, Vsevolod; Koshevaya, S.; Cruz-Abeyro, J. A. López; Valdez-Gonzalez, C.; Cerón, R. A. Villegas

doi:10.5194/adgeo-14-21-2008

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…A number of previous studies had reported a remarkable anomalous variation in the geomagnetic pulsations nearby several volcanoes (Johnston and Stacey, 1969;Johnston, 1997;Kotsarenko et al, 2005Kotsarenko et al, , 2008. Therefore, in the present study, the amplitude of the geomagnetic pulsation (Pc3 range) is examined to detect any characteristic signals that may be generated in relationship with the activity of the Mayon volcano.…”

Section: Data Analysis and Resultsmentioning

confidence: 90%

Anomalous geomagnetic variations associated with the volcanic activity of the Mayon volcano, Philippines during 2009–2010

Takla

Yoshikawa

Kawano

et al. 2014

NRIAG Journal of Astronomy and Geophysics

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Local anomalous geomagnetic variations preceding and accompanying the volcanic eruptions had been reported by several researchers. This paper uses continuous high-resolution geomagnetic data to examine the occurrence of any anomalous geomagnetic field variations that possibly linked with the volcanic eruption of the Mayon volcano, Philippines during 2009-2010. The nearest geomagnetic observing point from the Mayon volcano is the Legazpi (LGZ) station, Philippines; which is located about 13 km South of the Mayon volcano. The amplitude range of daily variations and the amplitude of Ultra Low Frequency emissions in the Pc3 range (Pc3; 10-45 s) were examined at the LGZ station and also were compared with those from the Davao (DAV) station, Philippines as a remote reference station. Both the LGZ and DAV stations belong to the MAGDAS Network. The result of data analysis reveals significant anomalous changes in the amplitude range of daily variations and the Pc3 amplitude at the LGZ station before and during the volcanic eruption of the Mayon volcano. From the obtained results, it appears that the observed anomalous variations are dependent on the change in the underground conductivity connected with variation in the physical properties of the Earth's crust due to the activity of the Mayon volcano. Therefore, these anomalous geomagnetic variations are considered to be of a local volcanic origin.

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Section: Data Analysis and Resultsmentioning

confidence: 90%

Anomalous geomagnetic variations associated with the volcanic activity of the Mayon volcano, Philippines during 2009–2010

Takla

Yoshikawa

Kawano

et al. 2014

NRIAG Journal of Astronomy and Geophysics

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“…Magnetic signals can also indicate periods of magma injection and gas pressure build-up; Negative magnetic anomalies during 1998-1999 were considered to be thermal caused by hot incoming magma while positive anomalies were related with dome cooling above the Curie point. Kotsarenko et al (2008), also noted thermally induced changes in the geomagnetic record. Sharp positive anomalies are stress related as was seen in the correlation with a tectonic regional earthquake and explosions (Martin-Del Pozzo, 2002c).…”

Section: Magneticsmentioning

confidence: 87%

Precursors to eruptions of Popocatépetl Volcano, Mexico

Pozzo

2012

GeofInt

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Las erupciones volcánicas pueden ser precedidas por cambios en la actividad sísmica y vulcanomagnética, en la composición química de los gases, del agua de manantiales y algunas veces por deformación. Para hacer un pronóstico volcánico adecuado es necesario reconocer estas señales indicativas de una erupción y su temporalidad. Las erupciones del Popocatépetl que comenzaron el 21 de Diciembre 1994, fueron precedidas por aumentos en los eventos sísmicos vulcanotectónicos (VTs), cambios en temperatura y concentración de sulfatos y cloruros en el lago del cráter y en la en los manantiales. También hubo un descenso en pH en algunos manantiales varios meses antes de la erupción. Los eventos sísmicos de periodo largo también aumentaron antes de algunas erupciones y los episodios de tremor armónico así como las anomalías magnéticas negativas antecedieron a la formación de domos y están ligadas al ascenso de magma. La energía sísmica cumulativa de los VTs muestra una aceleración en la tasa antes de las erupciones principales. Hubo precursores claros antes de las erupciones de diciembre- enero 2001, como son las anomalías magnéticas negativas correlacionadas con el incremento en la sismicidad, así como pequeños cambios en los manantiales. Estos cambios ocurrieron 2 meses antes de la erupción. Adicionalmente, unos días antes se presentaron episodios de tremor armónico de gran amplitud y aumento en el flujo de , esto, junto con el análisis de los datos del RSAM permitió hacer una evaluación y pronóstico adecuado de la erupción de 2000.

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“…Our earlier studies in the Popocatepetl Volcano area (2003)(2004)(2005)(2006) showed a variety of geomagnetic anomalies that were associated with volcano activity [Kotsarenko et al 2007] and also allowed us to propose the hypothesis of the existence of a second magmatic reservoir [Kotsarenko et al 2008]. The present study is devoted to various aspects of radon monotoring that was carried out in the first stage of our experimental investigations into the area of Popocatepetl Volcano (December 2007to December 2009.…”

Section: Special Issue: Earthquake Precursorsmentioning

confidence: 87%

“…The intensive radon release for Tlamacas Mountain encouraged us to revise our earlier discovered phenomena [Kotsarenko et al 2007[Kotsarenko et al , 2008: long-term noise was observed in the geomagnetic field measured at the Tlamacas station (Figure 6). To estimate the noise contribution, we compared the noise character for the Tlamacas station registered during a highly perturbed day with a referent signal contaminated by electric welding measured 200 m away from the welding source in Campus Juriquilla, Querétaro, during the construction of a new building.…”

Section: New View On the Volcano And Seismogenic Geomagnetic Emissionsmentioning

confidence: 99%

Experimental studies of anomalous radon activity in the Tlamacas Mountain, Popocatepetl Volcano area, México: new tools to study lithosphere-atmosphere coupling for forecasting volcanic and seismic events

Kotsarenko

Grimalsky

Yutsis

et al. 2012

Annals of Geophysics

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This study presents and discusses the results of soil radon monitoring at three different volcano sites and one reference site, from December 2007 to January 2009. This relates to the activity of the Popocatepetl Volcano and a radon survey and gamma-ray spectrometry in the area between Paso de Cortes and Tlamacas Mountain, and in the adjacent regions. The results are applied to the aspects of atmosphere electricity and lithosphere-atmosphere coupling in relation to the forecasting of volcano and earthquake activity. The monitoring of radon release reveals a decrease in radon concentration (down to total suppression) with approaching moderate volcanic eruptions. The behavior of the radon activity at the Tlamacas site is more apparent, compared to other observational sites. The average level of radon release observed at the Tlamacas site is much higher, with some characteristic variations. Both the radon survey and gamma-ray spectrometry indicate intensive diffusion radon emission localized in the area of Tlamacas Mountain. The average radon concentration in the area of Tlamacas is about 10-20-fold greater than the background volcano values. The new concept of lithosphere-atmosphere coupling is presented: intensive radon release in high elevated areas shortens and modifies the Earth-to-thunderclouds electric circuit, which provokes microdischarges into the air close to the ground, attracting lightning discharges. This concept attempts to explain in a new way the noise-like geomagnetic emissions registered before major earthquakes, and it promotes interest for the study of thunderstorm activity in seismo-active zones, as a promising instrument for earthquake forecasting.

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Geomagnetic anomalies observed at volcano Popocatepetl, Mexico

Cited by 8 publications

References 7 publications

Anomalous geomagnetic variations associated with the volcanic activity of the Mayon volcano, Philippines during 2009–2010

Anomalous geomagnetic variations associated with the volcanic activity of the Mayon volcano, Philippines during 2009–2010

Precursors to eruptions of Popocatépetl Volcano, Mexico

Experimental studies of anomalous radon activity in the Tlamacas Mountain, Popocatepetl Volcano area, México: new tools to study lithosphere-atmosphere coupling for forecasting volcanic and seismic events

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