Results 71 to 80 of about 15,161 (215)

Generalization of PhaseNet in Shandong and its application to the Changqing M4.1 earthquake sequenceKey points

Earthquake Science, 2023
Waveforms of seismic events, extracted from January 2019 to December 2021 were used to construct a test dataset to investigate the generalizability of PhaseNet in the Shandong region.
Zonghui Dai, Lianqing Zhou, Xuhui Hu, Junhao Qu, Xia Li   +4 more
doaj   +1 more source

Crustal structure between the Knipovich Ridge and the Van Mijenfjorden (Svalbard) [PDF]

, 2002
The Alfred Wegener Institute of Polar and Marine Research, the University of Bergenand the Hokkaido University acquired new seismic refraction data along a transect fromthe Knipovich Ridge to the inner Van Mijenfjorden in southern Svalbard.
Jokat, Wilfried, Mjelde, R., Ritzmann, O., Shimamura, H.   +3 more
core   +1 more source

New Phoenix Magnetic Anomaly Data Confirms Global Nature of Jurassic Quiet Zone and Provides Insight Into Early Pacific Spreading

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract We demonstrate the presence of the oldest identifiable marine magnetic anomalies in the Phoenix lineations of the western Pacific based on careful assessment of new data. Recently acquired sea surface magnetic anomalies and multichannel seismic profiles confirm magnetic signals recorded within the Middle‐Jurassic to Early Cretaceous basement ...
Masako Tominaga, Maurice A. Tivey, Hannah F. Mark, William W. Sager, Jonas Preine   +4 more
wiley   +1 more source

Reducing the Parameter Dependency of Phase-Picking Neural Networks with Dice Loss

The Seismic Record
Training a neural network for picking seismic phase arrivals has been commonly posed as a segmentation problem. It is a highly imbalanced segmentation problem in the sense that the background vastly dominates the foreground because we are trying to pick ...
Yongsoo Park, Gregory C. Beroza
doaj   +1 more source

Interplay of Tectonics and Topography Facilitated Sudden Dyke Intrusion in 2022 at São Jorge Island, Azores

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Oblique slow rifting in a hotspot setting has created a distributed volcanic zone in the central part of the Azores but it's unclear what causes focusing of magma upflow under the islands within a wide plate boundary deformation zone. For São Jorge Island, we use a three‐dimensional finite element model to evaluate crustal stress from the ...
J. D’Araújo, A. Hooper, M. Lazecky, F. Sigmundsson, F. Albino, T. Ferreira, J. L. Gaspar   +6 more
wiley   +1 more source

Effect of river indus sand on concrete tensile strength [PDF]

, 2018
In the development of Pakistan construction industry, the utilization of River Indus sand in concrete as fine aggregate has expanded tremendously. The aim of this research is to study the effect of Indus River sand on the tensile strength of various ...
Abdul Samad, Abdul Aziz, Ahmed Jhatial, Ashfaque, Ahmed Vighio, Anees, Lakhiar, Muhammad Tahir, Mohamad, Noridah, Shaikh, Muhammad Abu Bakar   +5 more
core   +2 more sources

Teleseismic Radial Anisotropy Reveals a Sill‐Dominated Magma Reservoir Beneath the Valles Caldera, New Mexico

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract The Valles Caldera (VC), one of the largest Quaternary silicic calderas in North America, formed by explosive rhyolitic eruptions. Seismic studies suggest a crustal magmatic reservoir beneath the caldera with low‐velocity anomalies, but resolving the detailed geometry of localized melt requires constraints from seismic anisotropy.
Gaoshan Guo, Haiqiang Lan, Tao Xu, Qinya Liu   +3 more
wiley   +1 more source

SegPhase: development of arrival time picking models for Japan’s seismic network using the hierarchical vision transformer

Earth, Planets and Space
Seismic phase picking is a fundamental task in seismology that is crucial for event detection and earthquake cataloging; however, manual analysis is impractical given the scale of modern seismic networks. We present SegPhase, a novel seismic arrival time
Shinya Katoh, Yoshihisa Iio, Hiromichi Nagao, Hiroshi Katao, Masayo Sawada, Kazuhide Tomisaka   +5 more
doaj   +1 more source

A Microseismic Phase Picking and Polarity Determination Model Based on the Earthquake Transformer

Applied Sciences
Phase arrival times and polarities provide essential kinematic constraints for and dynamic insights into seismic sources, respectively. This information serves as fundamental data in seismological study.
Ling Peng, Lei Li, Xiaobao Zeng
doaj   +1 more source

Seismic Phase Detection & Picking using EfficientNet

, 2022
The monitoring of seismic waves for the detection of earthquakes and the picking of the arrival of P and S waves has been a challenging task in the field of observational seismology. While the use of deep learning techniques has led to improved performance, the models tend to suffer from poor generalizability and poor picking performance with the S ...
openaire   +1 more source