Sven Peter Näsholm
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View article: Toward Real‐Time Assessment of Infrasound Event Detection Capability Using Deep Learning‐Based Transmission Loss Estimation
Toward Real‐Time Assessment of Infrasound Event Detection Capability Using Deep Learning‐Based Transmission Loss Estimation Open
Accurate modeling of infrasound transmission loss is crucial for assessing the performance of the International Monitoring System, which monitors compliance with the Comprehensive Nuclear‐Test‐Ban Treaty by detecting atmospheric explosions…
View article: The Seismogenic Thickness of Venus
The Seismogenic Thickness of Venus Open
Growing evidence that volcanism is currently ongoing on Venus suggests that the sister planet of the Earth may also be seismically active. Given the success of seismic measurements on Mars and the Moon to reveal the interior structure of t…
View article: Joint design of transmit and receive array window functions via polynomial factorization
Joint design of transmit and receive array window functions via polynomial factorization Open
View article: Towards real-time assessment of infrasound event detection capability using deep learning-based transmission loss estimation
Towards real-time assessment of infrasound event detection capability using deep learning-based transmission loss estimation Open
Accurate modeling of infrasound transmission loss is essential for evaluating the performance of the International Monitoring System, enabling the effective design and maintenance of infrasound stations to support compliance of the Compreh…
View article: Towards real-time assessment of infrasound event detection capability using deep learning-based transmission loss estimation
Towards real-time assessment of infrasound event detection capability using deep learning-based transmission loss estimation Open
View article: Taylor-Series-Based Derivation of the Resolution of Null Subtraction Imaging for a Uniform Linear Array
Taylor-Series-Based Derivation of the Resolution of Null Subtraction Imaging for a Uniform Linear Array Open
View article: Construction of Orthogonal Transmit Sequences Using the Nearest Orthogonal Matrix
Construction of Orthogonal Transmit Sequences Using the Nearest Orthogonal Matrix Open
View article: Seismic Wave Detectability on Venus Using Ground Deformation Sensors, Infrasound Sensors on Balloons and Airglow Imagers
Seismic Wave Detectability on Venus Using Ground Deformation Sensors, Infrasound Sensors on Balloons and Airglow Imagers Open
The relatively unconstrained internal structure of Venus is a missing piece in our understanding of the formation and evolution of the Solar System. Detection of seismic waves generated by venusquakes is crucial to determine the seismic st…
View article: Estimating annulus sealing properties using the flexural wave spectrum in pitch-catch well-logging
Estimating annulus sealing properties using the flexural wave spectrum in pitch-catch well-logging Open
View article: Constraining the Seismogenic Thickness of Venus
Constraining the Seismogenic Thickness of Venus Open
The surface of Venus presents a large variety of tectonic structures, from rift zones that extend thousands of kilometers [1], to globally spread wrinkle ridges [2] and coronae that could be associated with regional subduction [3]. In addi…
View article: The quest for quakes on Venus 
The quest for quakes on Venus  Open
Last year, the first active lava flow on Venus was discovered by Herrick & Hensley (2023), adding to the growing body of evidence that Venus is currently volcanically active with frequently erupting volcanoes (Byrne & Krishnamoorth…
View article: Potential Seismically Active Target Regions on Venus
Potential Seismically Active Target Regions on Venus Open
Venus represents a terrestrial planet similar to Earth in size and mass, but its evolution has been different enough to lead to the formation of a different planetary environment. Understanding the interior processes that shape Venus’…
View article: Retrieving Seismic Source Characteristics Using Seismic and Infrasound Data: The 2020 <i>M</i><sub>L</sub> 4.1 Kiruna Minequake, Sweden
Retrieving Seismic Source Characteristics Using Seismic and Infrasound Data: The 2020 <i>M</i><sub>L</sub> 4.1 Kiruna Minequake, Sweden Open
A minequake of magnitude M L 4.1 occurred on 18 May 2020 early in the morning at the LKAB underground iron ore mine in Kiruna, Sweden. This is the largest mining‐induced earthquake in Scandinavia. It generated acoustic signals observed at …
View article: Retrieving seismic source characteristics using seismic and infrasound data: the 2020 mb 4.9 Kiruna minequake, Sweden
Retrieving seismic source characteristics using seismic and infrasound data: the 2020 mb 4.9 Kiruna minequake, Sweden Open
A minequake of magnitude m 4.9 occurred on 18 May 2020 early in the morning at the LKAB underground iron ore mine in Kiruna, Sweden. This is the largest mining-induced earthquake in Scandinavia. It generated acoustic signals observed at th…
View article: Using Satellite Data Assimilation Techniques to Combine Infrasound Observations and a Full Ray-Tracing Model to Constrain Stratospheric Variables
Using Satellite Data Assimilation Techniques to Combine Infrasound Observations and a Full Ray-Tracing Model to Constrain Stratospheric Variables Open
Infrasound waves generated at Earth’s surface can reach high altitudes before returning to the surface to be recorded by microbarometer array stations. These waves carry information about the propagation medium, in particular temperature a…
View article: Probing a planet from the subsurface to the atmosphere with infrasound data
Probing a planet from the subsurface to the atmosphere with infrasound data Open
The analysis of infrasound waves has a significant potential for retrieving a range of geophysical parameters across various scales, such as atmospheric structures, characteristics of surface and buried sources, and seismic velocity struct…
View article: Estimating stratospheric polar vortex strength using ambient ocean‐generated infrasound and stochastics‐based machine learning
Estimating stratospheric polar vortex strength using ambient ocean‐generated infrasound and stochastics‐based machine learning Open
There are sparse opportunities for direct measurement of upper stratospheric winds, yet improving their representation in subseasonal‐to‐seasonal prediction models can have significant benefits. There is solid evidence from previous resear…
View article: Seismic wave detectability on Venus using ground deformation sensors, infrasound sensors on balloons and airglow imagers
Seismic wave detectability on Venus using ground deformation sensors, infrasound sensors on balloons and airglow imagers Open
The relatively unconstrained internal structure of Venus is a missing piece in our understanding of the Solar System formation and evolution. To determine the seismic structure of Venus’ interior, the detection of seismic waves generated b…
View article: Recent Enhancements of the Volcanic Information System (VIS): An Infrasound-Based Long-Range Volcanic Eruption Notification System
Recent Enhancements of the Volcanic Information System (VIS): An Infrasound-Based Long-Range Volcanic Eruption Notification System Open
Volcanic explosive eruptions produce large amounts of low-frequency (250 km) with sustained ash-columns and provide early warnings to mitigate the risk that eruptions pose to civil aviation. Additionally, it can reconstruct the chronology …
View article: Long range monitoring of explosive volcanoes with IMS infrasound arrays: testing the VIS
Long range monitoring of explosive volcanoes with IMS infrasound arrays: testing the VIS Open
Detecting and promptly reporting ongoing volcanic eruptions is crucial in supporting Volcanic Ash Advisory Centers (VAACs) in their mission to inform about ash clouds that may endanger aviation. Nevertheless, many active volcanoes lack loc…
View article: Exploring the feasibility of detecting seismically-generated infrasound waves on Venus using balloon platforms
Exploring the feasibility of detecting seismically-generated infrasound waves on Venus using balloon platforms Open
Seismic waves are a primary source of information for our understanding of Earth's internal structure and they provide important constraints on subsurface seismic-velocity properties. However, traditional inversion methods cannot be implem…
View article: Seismicity on Venus: optimal detection methods and target regions
Seismicity on Venus: optimal detection methods and target regions Open
With the selection of multiple missions to Venus by NASA and ESA that are planned to launch in the coming decade, we will greatly improve our understanding of Venus. However, none of these missions have determining the seismicity of the pl…
View article: Multidisciplinary integration of FAIR Research Infrastructures in the Geo-INQUIRE initiative: the EPOS &#8211; EMSO case
Multidisciplinary integration of FAIR Research Infrastructures in the Geo-INQUIRE initiative: the EPOS – EMSO case Open
In the last decade, the scientific community has witnessed growing emphasis on data integration. The primary objective is to harness multidisciplinary data and resources to drive novel methodological approaches and scientific breakthroughs…
View article: Robust Non-Parametric Estimation of Speckle Probability Densities and gCNR
Robust Non-Parametric Estimation of Speckle Probability Densities and gCNR Open
In ultrasound imaging, speckle originates from a large amount of sub-resolution scatterers within the medium. In idealized cases, the speckle envelope statistics follow a Rayleigh distribution, but in practical pulse-echo imaging, the dist…
View article: Detecting Explosive Volcanism Using Global Long-Range Infrasound Data
Detecting Explosive Volcanism Using Global Long-Range Infrasound Data Open
View article: Adding a low frequency limit to fractional wave propagation models
Adding a low frequency limit to fractional wave propagation models Open
Power-law attenuation in elastic wave propagation of both compressional and shear waves can be described with multiple relaxation processes. It may be less physical to describe it with fractional calculus medium models, but this approach i…
View article: Tracking aftershock sequences using empirical matched field processing
Tracking aftershock sequences using empirical matched field processing Open
SUMMARY Extensive aftershock sequences present a significant problem to seismological data centres attempting to produce near real-time comprehensive seismic event bulletins. An elevated number of events to process and poorer performance o…
View article: High-speed echoes in the polar winter mesosphere: Infrasound as a probable cause
High-speed echoes in the polar winter mesosphere: Infrasound as a probable cause Open
We considered three events on 4 November 2015, 22 December 2016, and 12 November 2018, when the signals travelling in the polar winter mesosphere with high horizontal velocities above 300 m/s were measured by the atmospheric radar ESRAD (C…
View article: Probing Gravity Waves in the Middle Atmosphere Using Infrasound From Explosions
Probing Gravity Waves in the Middle Atmosphere Using Infrasound From Explosions Open
This study uses low‐frequency, inaudible acoustic waves (infrasound) to probe wind and temperature fluctuations associated with breaking gravity waves (GWs) in the middle atmosphere. Building on an approach introduced by Chunchuzov et al.,…
View article: Worst-case analysis of array beampatterns using interval arithmetic
Worst-case analysis of array beampatterns using interval arithmetic Open
Over the past decade, interval arithmetic (IA) has been used to determine tolerance bounds of phased-array beampatterns. IA only requires that the errors of the array elements are bounded and can provide reliable beampattern bounds even wh…