Correction to "Ascending seismic source during an explosive eruption at Tungurahua volcano, Ecuador”

2011 ◽  
Author(s):  
Hiroyuki Kumagai ◽  
Pablo Placios ◽  
Mario Ruiz ◽  
Hugo Yepes ◽  
Tomofumi Kozono
Keyword(s):  
Explosive Eruption ◽  
Seismic Source ◽  
Tungurahua Volcano

scholarly journals Ascending seismic source during an explosive eruption at Tungurahua volcano, Ecuador

2011 ◽  
Vol 38 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Hiroyuki Kumagai ◽  
Pablo Placios ◽  
Mario Ruiz ◽  
Hugo Yepes ◽  
Tomofumi Kozono
Keyword(s):  
Explosive Eruption ◽  
Seismic Source ◽  
Tungurahua Volcano

scholarly journals Drumbeat LP “Aftershocks” to a Failed Explosive Eruption at Tungurahua Volcano, Ecuador

2020 ◽  
Vol 47 (16) ◽  
Author(s):  
S. Butcher ◽  
A. F. Bell ◽  
S. Hernandez ◽  
E. Calder ◽  
M. Ruiz ◽  
...  
Keyword(s):  
Explosive Eruption ◽  
Tungurahua Volcano

scholarly journals A Devastating Plinian Eruption at Tungurahua Volcano Reveals Formative Occupation at ∼1100 cal BC in Central Ecuador

Radiocarbon ◽  
2013 ◽  
Vol 55 (3) ◽  
pp. 1199-1214 ◽  
Author(s):  
J-L Le Pennec ◽  
G de Saulieu ◽  
P Samaniego ◽  
D Jaya ◽  
L Gailler
Keyword(s):  
Late Holocene ◽  
Explosive Eruption ◽  
Coastal Region ◽  
Formative Period ◽  
Plinian Eruption ◽  
Magma Intrusion ◽  
The Andes ◽  
Failure Event ◽  
Pottery Sherds ◽  
Tungurahua Volcano

Based on archaeological and radiometric constraints, previous studies have divided pre-Columbian times of Ecuador into a succession of cultural periods. The Paleoindian and Preceramic periods encompass the time from the first Amerindian occupation to about 4000 BC. The Formative period extends from ∼4000 to ∼300 BC, while the Regional Development (∼300 BC to ∼AD 700) and Integration periods predate the Columbian period, which starts in AD 1533 in Ecuador. The Formative cultural period is poorly known from earlier studies. Here, we bring the first documentation of Formative age occupation around Tungurahua Volcano, 120 km SW of Quito, and show that local settlements were devastated by a violent eruption around 1100 cal BC. Recent volcanological works combining lithostratigraphic, petrologic, and geochronologic analyses reveal that the steep-sloped Tungurahua edifice suffered a major Late Holocene flank failure. We show that the failure event resulted from a major explosive eruption triggered by massive magma intrusion inside the volcano. Decompression of the magma due to a flank collapse resulted in a violent, high-velocity directed blast explosion, which deposited charcoaland sherd-rich ash layers upon and near the volcano. Our 14C results range from 2225 ± 30 to 5195 ± 45 BP, but most cluster between 2640 ± 45 and 3195 ± 45 BP. A calibration analysis indicates that the event took place at ∼1100 cal BC, in the Formative period. We gathered 38 pottery sherds from 3 localities. The sherds show a diversity of size, shape, color, and ornamentation. Examination of pastes, surface finish, and firing indicates that our material shares many common features from site to site. The material from Tungurahua shares affinities with the Cotocollao tradition, which developed in the Quito region between 1500 and 500 BC, and with the Machalilla tradition (coastal region of Ecuador), with the occurrence of carinated bowls with punctuate decorations at 1500–1000 BC. Our study reveals that the ∼1100 cal BC Plinian eruption of Tungurahua Volcano is among the oldest known volcanic disasters in the Andes.

Elastic Full Waveform Inversion With a Permanent Seismic Source ACROSS: Towards Hydrocarbon Reservoir Monitoring

2014 ◽  
Author(s):  
Mamoru Takanashi ◽  
Ayato Kato ◽  
Junzo Kasahara ◽  
Stefan Luth ◽  
Christopher Juhlin
Keyword(s):  
Waveform Inversion ◽  
Seismic Source ◽  
Full Waveform Inversion ◽  
Hydrocarbon Reservoir ◽  
Full Waveform ◽  
Reservoir Monitoring

Feasibility study for a periodic downhole seismic source

1989 ◽  
Author(s):  
R. G. Hills ◽  
H. C. Hardee
Keyword(s):  
Feasibility Study ◽  
Seismic Source

The First Very Broadband Mediterranean Network: 30 Yr of Data and Seismological Research

2019 ◽  
Vol 91 (2A) ◽  
pp. 787-802
Author(s):  
Silvia Pondrelli ◽  
Francesca Di Luccio ◽  
Laura Scognamiglio ◽  
Irene Molinari ◽  
Simone Salimbeni ◽  
...  
Keyword(s):  
Seismic Source ◽  
Global Scale ◽  
Anthropogenic Noise ◽  
Earth Structure ◽  
Backbone Network ◽  
Early Adoption ◽  
Stable Conditions ◽  
Remote Sites ◽  
The Mediterranean

Abstract Starting in 1988, with the installation of the first broadband (BB) instrument in Italy, the Mediterranean Very Broadband Seismographic Network (MedNet) program established a backbone network of BB stations of the highest quality in the Mediterranean Sea countries. The Mediterranean region is characterized by relevant and frequent seismicity related to its complex tectonics, due to the convergence of two major plates, Africa and Eurasia, and the involvement of other minor plates, as the Adriatic plate. Therefore, the MedNet project became a scientific research infrastructure of excellence, able to fill the gap of regional coverage when the availability of seismic BB instruments was still scarce. The main characteristics of the MedNet network are the highest quality of the seismographic instrumentation at remote sites and very low level of anthropogenic noise with stable conditions of pressure and temperature. After 30 yr of recordings, the MedNet program has proven that the early adoption of very BB instruments in selected sites have been the best choice. A large number of studies benefited from MedNet data, as seismic source computation and Earth structure reconstruction, at local and global scale. We present a concise overview of the contribution given by MedNet data in the last three decades to motivate and financially support the existence of this valuable infrastructure, and to further maintain this project.

Sign in / Sign up

Export Citation Format

Share Document