Array signal processing on distributed acoustic sensing data: Directivity effects in slowness space

SP Näsholm, K Iranpour, A Wuestefeld… - Journal of …, 2022 - Wiley Online Library
Abstract Distributed Acoustic Sensing (DAS) involves the transmission of laser pulses along
a fiber‐optic cable. These pulses are backscattered at fiber inhomogeneities and again …

Background Seismicity Monitoring to Prepare for Large‐Scale Storage Offshore Norway

Z Zarifi, A Köhler, P Ringrose… - Seismological …, 2023 - pubs.geoscienceworld.org
Prior to planned CO 2 injection startup in the Horda platform offshore western Norway, in
2024, the Horda Network project has taken several measures to assess the potential of …

ArrayNet: A Combined Seismic Phase Classification and Back‐Azimuth Regression Neural Network for Array Processing Pipelines

A Köhler, EB Myklebust - Bulletin of the Seismological …, 2023 - pubs.geoscienceworld.org
Array processing is an integral part of automatic seismic event detection pipelines for
measuring apparent velocity and backazimuth of seismic arrivals. Both quantities are usually …

Seismic monitoring of permafrost in Svalbard, Arctic Norway

J Albaric, D Kühn, M Ohrnberger… - Seismological …, 2021 - pubs.geoscienceworld.org
We analyze data from passive and active seismic experiments conducted in the
Adventdalen valley of Svalbard in the Norwegian Arctic. Our objective is to characterize the …

On the potential of offshore sensors and array processing for improving seismic event detection and locations in the North Sea

AE Jerkins, A Köhler, V Oye - Geophysical Journal International, 2023 - academic.oup.com
The capability to detect and locate seismicity in the North Sea is necessary to ensure the
safety of future CO2 storage operations. Currently, the event location capabilities are …

Locating the Nordstream explosions without a velocity model using polarization analysis

SC Stähler, G Zenhäusern, J Clinton… - arXiv preprint arXiv …, 2022 - arxiv.org
The seismic events that preceded the leaks in the Nordstream pipelines in the Baltic Sea
have been interpreted as explosions on the seabed, most likely man-made. We use a …

Crustal structure and intraplate seismicity in Nordland, Northern Norway: Insight from seismic tomography

HA Shiddiqi, L Ottemöller, S Rondenay… - Geophysical Journal …, 2022 - academic.oup.com
SUMMARY The Nordland region, Northern Norway, situated in an intraplate continental
setting, has the highest seismicity rate in mainland Norway. However, the exact cause of …

[HTML][HTML] Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach

E Vorobeva, M De Carlo, A Le Pichon… - Annales …, 2021 - angeo.copernicus.org
This study investigates the use of a vespagram-based approach as a tool for multi-
directional comparison between simulated microbarom soundscapes and infrasound data …

Case study of combined marine‐and land‐based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard

HM Stemland, BO Ruud… - Near Surface …, 2023 - Wiley Online Library
Glaciers generate seismic waves due to calving and fracturing, meaning that recording and
following event classification can be used to monitor glacier dynamics. Our aim with this …

Structure of the crust and upper mantle in Greenland and northeastern Canada: insights from anisotropic Rayleigh-wave tomography

P Ajourlou, F Darbyshire, P Audet… - Geophysical Journal …, 2024 - academic.oup.com
Seismic velocity models provide important constraints on Greenland's deep structure, which,
in turn, has profound implications for our understanding of the tectonic history of this region …