Occurrence of shallow earthquakes following periods of intense rainfall in Tenerife, Canary Islands

Jiménez, M. J.; Garcı́a-Fernández, Mariano

doi:10.1016/s0377-0273(00)00237-7

Cited by 25 publications

(12 citation statements)

References 24 publications

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“…6). Similar correlation between the number of microearthquakes and intensity of rainfalls was observed at volcanic island of Tenerife (Jimenez and Garcia-Fernandez, 2000).…”

Section: Eruption Mechanismsupporting

confidence: 78%

Decade-long study of degassing at Kudriavy volcano, Iturup, Kurile Islands (1990–1999): Gas temperature and composition variations, and occurrence of 1999 phreatic eruption

et al. 2014

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A high-temperature (up to 940• C) fumarolic activity at Kudriavy volcano had been studied during 1990-1999. The maximum gas temperatures of the fumaroles were measured in 1992 as 940• C, then gradually decreased with time and reached to 907• C in 1999. Gas composition of the high-temperature fumarole became enriched in H 2 O and depleted in other gas components, in particular in CO 2 . Hydrogen isotopic compositions of the high-temperature fumarolic gases were gradually depleted in deuterium. The gradual and continuous decrease in temperature and changes in gas composition observed during the last 10-year suggest that a magmatic melt have been degassing in a relatively steady-state manner from a single magma chamber. The detail investigations in 1998 and 1999 revealed short-term changes in gas composition characterized by sporadic increases in H 2 , CO 2 , and S total after intense precipitations. Small-scale eruptions occurred on October 7, 1999 at the summit. The ratios of major gas components (C/S, C/Cl, S/Cl, C/F, S/F, and Cl/F) significantly increased just prior to the eruption. The eruption at the Kudriavy volcano in 1999 was likely a phreatic eruption as a result of the intense precipitations after unusually long dry period. Meteoric water penetrated into the hot zone of volcano edifice and rapidly boiled causing the eruption.

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“…6). Similar correlation between the number of microearthquakes and intensity of rainfalls was observed at volcanic island of Tenerife (Jimenez and Garcia-Fernandez, 2000).…”

Section: Eruption Mechanismsupporting

confidence: 78%

Decade-long study of degassing at Kudriavy volcano, Iturup, Kurile Islands (1990–1999): Gas temperature and composition variations, and occurrence of 1999 phreatic eruption

et al. 2014

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“…This change was firstly attributed to big rainfall. But in turn, some literature reported the strict link between pore pressure increase (rain falls) and earthquake triggering (Sibson 1977;Quattrocchi 1999;Jimenez and Garcia-Fernandez 2000), however, in case of Taiwan it may not be applicable. For example, the excessive precipitation brought in by Typhoon Morakot in Southern Taiwan.…”

Section: Resultsmentioning

confidence: 99%

“…Persistent heavy rain for one week may provide an intense rain in the area of the studied earthquakes. However, the precipitation effect is too shallow to be referred to the deep earthquake (Jimenez and Garcia-Fernandez 2000;Menzies et al 2016). The soil radon measurements provide a useful tool for exploring earthquake precursors in Taiwan.…”

Section: Discussionmentioning

confidence: 99%

Preseismic anomalies in soil-gas radon associated with 2016 M 6.6 Meinong earthquake, Southern Taiwan

Fu¹,

Walia²,

Yang³

et al. 2017

Terr. Atmos. Ocean. Sci.

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Taiwan is tectonically situated in a terrain resulting from the oblique collision between the Philippine Sea plate and the continental margin of the Asiatic plate, with a continuous stress causing the density of strong-moderate earthquakes and regional active faults. The continuous time series of soil radon for earthquake studies have been recorded and some significant variations associated with strong earthquakes have been observed. Earthquake prediction is not still operative but these correlations should be added to the literature about seismo-geochemical transients associated to strong earthquakes. Rain-pore pressure related variations, crustal weakness at the studied faults system is consistent with the simultaneous radon anomalies observed. During the observations, a significant increase of soil radon concentrations was observed at Chunglun-T1 (CL-T1), Hsinhua (HH), Pingtung (PT), and Chihshan (CS) stations approximately two weeks before the Meinong earthquake (M L = 6.6, 6 February 2016) in Southern Taiwan. The precursory changes in a multi-stations array may reflect the preparation stage of a large earthquake. Precursory signals are observed simultaneously and it can apply certain algorithms the approximate location and magnitude of the impending earthquake.

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“…Earthquake seasonality (i.e., a bias favoring seismicity in one season) was documented three decades ago along the PNA plate boundary (McClellan, 1984) and has since been reported in almost every other type of plate tectonic setting, including convergence zones in the western Pacific (Matsumura, 1986;Ohtake and Nakahara, 1999;Heki, 2003), the Himalaya (Tiwari et al, 2005;Bettinelli et al, 2008), and the Mediterranean region (Pedrami, 1985;Muço, 1995;Hainzl et al, 2006); transforms in New Zealand and offshore of Oregon (Matsumura, 1986); the Gorda ridge (Matsumura, 1986) and mid-Atlantic spreading zones (Jónsdóttir et al, 2007); and oceanic and continental intraplate areas (Jiménez and García-Fernández, 2000;Costain, 2008).…”

Section: Future Studiesmentioning

confidence: 89%

Semiannual Earthquake Periodicity

McClellan¹

2015

Bulletin of the Seismological Society of America

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Large mainshocks in the Uniform California Earthquake Rupture Forecast (UCERF) catalog appear to have been nonrandom in time in the northern California region. Magnitude M ≥ 6:4 earthquakes clustered significantly in the halfyearly solar declination cycle. The most likely explanation appears to be natural earthquake periodicity, because the semiannual bias (1) persists in historical and instrumental catalog subsets, regardless of foreshocks or aftershocks, (2) is not contradicted by pre-1850 data for northern California, and (3) is replicated in southern California subregions, other plate-tectonic settings, and global seismicity. Alternatively, the UCERF catalog has overlooked many M ≥ 6:4 mainshocks that occurred outside of the observed semiannual clustering phase or contains systematic errors that bias the distribution of large earthquakes in the semiannual cycle. The semiannual clustering in northern California shifted abruptly after the great 1906 earthquake from a phase during the month after equinox to a phase near solstice, with large earthquakes returning to the postequinox phase since about 1980. In some other regions where semiannual clustering is evident, a similar phase shift occurred after a great earthquake. Correspondence between the semiannual phase and the tectonic regime of the clustered earthquakes suggests those two parameters may be related. I speculate that the apparent periodicity is a response of the regional fault network to the semiannual solid-earth tide and explore possible explanations for the shift in its net phase after a great earthquake.

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Occurrence of shallow earthquakes following periods of intense rainfall in Tenerife, Canary Islands

Cited by 25 publications

References 24 publications

Decade-long study of degassing at Kudriavy volcano, Iturup, Kurile Islands (1990–1999): Gas temperature and composition variations, and occurrence of 1999 phreatic eruption

Decade-long study of degassing at Kudriavy volcano, Iturup, Kurile Islands (1990–1999): Gas temperature and composition variations, and occurrence of 1999 phreatic eruption

Preseismic anomalies in soil-gas radon associated with 2016 M 6.6 Meinong earthquake, Southern Taiwan

Semiannual Earthquake Periodicity

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