Observations of high-frequency harmonic tremor in Fogo, Cape Verde Islands

Heleno, Sandra; Faria, Bruno; Bandomo, Zuleyka; Fonseca, João F. B. D.

doi:10.1016/j.jvolgeores.2006.06.018

Cited by 19 publications

(17 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Frequency up gliding was observed from less than 1 up to 30 Hz or 5 to 30 Hz prior to explosions, down gliding interrupted by small up glidings had fundamental frequencies above 5 Hz (Hotovec et al, 2013). Other strong up and down glidings (Benoit and McNutt, 1997;Hagerty et al, 2000;Jousset et al, 2003;De Angelis and McNutt, 2007;Almendros et al, 2012) and fundamental frequencies of more than 5 Hz were observed on various volcanoes (Dziak and Fox, 2002;Heleno et al, 2006;Franek et al, 2014). The latter can be similar to a helicopter passing a seismometer at a greater distance where no gliding but only the frequency of the rotor blades is observed.…”

Section: Summary Of Results and Discussionmentioning

confidence: 94%

See 1 more Smart Citation

Helicopter vs. volcanic tremor: Characteristic features of seismic harmonic tremor on volcanoes

Eibl

Lokmer

Bean

et al. 2015

Journal of Volcanology and Geothermal Research

View full text Add to dashboard Cite

Section: Summary Of Results and Discussionmentioning

confidence: 94%

“…However, harmonic tremor with fundamental frequencies above 5 Hz was observed at Fogo (Heleno et al, 2006), a mud volcano in the SW Barents Sea (Franek et al, 2014) and a fundamental frequency of 10 Hz with 3 overtones was detected at a submarine volcano in the Pacific (Dziak and Fox, 2002). Mt.…”

Section: Introductionmentioning

confidence: 96%

Helicopter vs. volcanic tremor: Characteristic features of seismic harmonic tremor on volcanoes

Eibl

Lokmer

Bean

et al. 2015

Journal of Volcanology and Geothermal Research

View full text Add to dashboard Cite

“…4). Both the Cadamostro seamount and volcanic cones between Fogo and Brava are likely candidates causing offshore tremor activity recorded on Fogo (Heleno et al 2006).…”

Section: Bathymetric Mappingmentioning

confidence: 99%

Seismic activity at Cadamosto seamount near Fogo Island, Cape Verdes-formation of a new ocean island?

Grevemeyer¹,

Helffrich

Faria³

et al. 2010

Geophysical Journal International

View full text Add to dashboard Cite

S U M M A R YIn global catalogues only a handful of earthquakes occurred at or near the Cape Verde islands. The two most recent events occurring in 1998 and 2004 were observed in the southwest of the Cape Verde archipelago away from aerial volcanic centres. Event relocation suggests that both earthquakes may occur at the Cadamosto seamount, a 3-km-tall submarine volcanic edifice to the southwest of the active volcanic islands of Fogo. Swath mapping efforts revealed numerous small volcanic cones between the volcanic island of Brava and the seamount and between Fogo and Brava. The distribution of volcanic vents may support two plumbing systems, one feeding Fogo and volcanic cones between Fogo and Brava and another system feeding Cadamosto seamount. Using ocean-bottom seismic stations of opportunity, deployed roughly a month after a m b = 4.3 earthquake occurred in 2004 August near or at the Cadamosto seamount, we were able to locate local seismic activity clustering at the seamount. We propose that these events reflect brittle rock failure due to magma redistribution in or near a central magma reservoir or more likely dyke intrusion. The observations reported here suggest that Cadamosto seamount is the seismically most active feature in the archipelago. It might be reasonable to hypothesis that ongoing activity causes the Cadamosto seamount to grow, forming a new oceanic island in the future.

show abstract

“…Fogo Island ($40,000 inhabitants) is a 30-km-wide active volcano that last erupted in 1995 (Heleno et al, 1999(Heleno et al, , 2006. The island is located in the southwestern part of the Cape Verde archipelago, some 800 km off the coast of Africa (Fig.…”

Section: Fogo Volcanomentioning

confidence: 99%

Seasonal tropospheric influence on SAR interferograms near the ITCZ – The case of Fogo Volcano and Mount Cameroon

Heleno¹,

Frischknecht

d’Oreye

et al. 2010

Journal of African Earth Sciences

View full text Add to dashboard Cite

Observations of high-frequency harmonic tremor in Fogo, Cape Verde Islands

Cited by 19 publications

References 32 publications

Helicopter vs. volcanic tremor: Characteristic features of seismic harmonic tremor on volcanoes

Helicopter vs. volcanic tremor: Characteristic features of seismic harmonic tremor on volcanoes

Seismic activity at Cadamosto seamount near Fogo Island, Cape Verdes-formation of a new ocean island?

Seasonal tropospheric influence on SAR interferograms near the ITCZ – The case of Fogo Volcano and Mount Cameroon

Contact Info

Product

Resources

About