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View article: Infrasound reveals detailed eruptive processes at Nyiragongo volcano and enhances monitoring capabilities during unrest periods
Infrasound reveals detailed eruptive processes at Nyiragongo volcano and enhances monitoring capabilities during unrest periods Open
Eruptions at continental basaltic volcanoes can take and combine various forms, including lava lakes, lava flows and fountaining, explosions or structural collapses. Aside from a few well-instrumented cases worldwide, accurately reconstruc…
View article: Decadal observations of deep ocean temperature change passively probed with acoustic waves
Decadal observations of deep ocean temperature change passively probed with acoustic waves Open
The oceans are filled with acoustic waves, which are trapped in a low-velocity layer at about 1 km water depth. The sound speed depends on the temperature. From hydroacoustic arrays, travel times can be obtained through cross-correlating t…
View article: Decadal observations of deep ocean temperature change passively probed with acoustic waves
Decadal observations of deep ocean temperature change passively probed with acoustic waves Open
The oceans are filled with acoustic waves, which are trapped in a low-velocity layer at about 1 km water depth. The sound speed of these waves strongly depends on the temperature. An increase in temperature will lead to an increase in the …
View article: Tracking jet stream winds through gravity waves arriving on surface based pressure sensors
Tracking jet stream winds through gravity waves arriving on surface based pressure sensors Open
Jet stream winds play an important role in our daily weather. Accurate wind and temperature estimations in the upper troposphere can lead to better medium to long-term weather forecasts. However, continuous measurement in the upper troposp…
View article: A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days
A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days Open
Climate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland ( Kalaallit Nunaat ), but none have been reported from the eastern fjords. In September 2023, we det…
View article: Passive Assessment of Geophysical Instruments Performance using Electrical Network Frequency Analysis
Passive Assessment of Geophysical Instruments Performance using Electrical Network Frequency Analysis Open
The electrical network frequency (ENF) of the alternating current operated on the power grid is a well-known source of noise in digital recordings. The noise (i.e., signal) is widespread and appears not just in close proximity to high-volt…
View article: Long term IMS infrasound measurements and seismo-acoustical analyses as a passive probe for climate change
Long term IMS infrasound measurements and seismo-acoustical analyses as a passive probe for climate change Open
The atmosphere is changing on a wide variety of timescales. The infrasound component of the International Monitoring System (IMS ) can sense such changes, each second over periods of tens of years. Such long term measurements of atmospheri…
View article: Passive Assessment of Geophysical Instruments Performance using Electrical Network Frequency Analysis
Passive Assessment of Geophysical Instruments Performance using Electrical Network Frequency Analysis Open
The electrical network frequency (ENF) of the alternating current operated on the power grid is a well-known source of noise in digital recordings. The noise is widespread and appears not just in close proximity to high-voltage power lines…
View article: Recommendations for microgravity campaigns and insight into volcanic subsidence and uplift gained from microgravity data at Askja, Iceland between 1988 - 2022
Recommendations for microgravity campaigns and insight into volcanic subsidence and uplift gained from microgravity data at Askja, Iceland between 1988 - 2022 Open
In August 2021, Askja volcano in Iceland experienced  a sudden onset of rapid uplift that followed decades of continuous subsidence. We review the extensive microgravity record from Askja, revisiting data recorded between 1988 and 201…
View article: Microgravity Change During the 2008–2018 Kılauea Summit Eruption: Nearly a Decade of Subsurface Mass Accumulation
Microgravity Change During the 2008–2018 Kılauea Summit Eruption: Nearly a Decade of Subsurface Mass Accumulation Open
Results from nine microgravity campaigns from Kı̄lauea, Hawaiʻi, spanning most of the volcano's 2008–2018 summit eruption, indicate persistent mass accumulation at shallow levels. A weighted least squares approach is used to recover microgr…
View article: Atmospheric waves and global seismoacoustic observations of the January 2022 Hunga eruption, Tonga
Atmospheric waves and global seismoacoustic observations of the January 2022 Hunga eruption, Tonga Open
The 15 January 2022 climactic eruption of Hunga volcano, Tonga, produced an explosion in the atmosphere of a size that has not been documented in the modern geophysical record. The event generated a broad range of atmospheric waves observe…
View article: Hydroacoustic Travel Time Variations as a Proxy for Passive Deep‐Ocean Thermometry—A Cookbook
Hydroacoustic Travel Time Variations as a Proxy for Passive Deep‐Ocean Thermometry—A Cookbook Open
We report on the extraction of deep ocean travel time variations from time‐lapse cross‐correlations between a hydrophone station and a three‐component broadband seismometer. The signals we cross‐correlate in this study result from repeated…
View article: Long‐Term Infrasonic Monitoring of Land and Marine‐Terminating Glaciers in Greenland
Long‐Term Infrasonic Monitoring of Land and Marine‐Terminating Glaciers in Greenland Open
A period of 18 years of infrasonic recordings was analyzed from a microbarometer array (I18DK) in northwestern Greenland, near Qaanaaq. A huge number of infrasonic detections, over 700,000, have been made in I18DKs soundscape during the Ar…
View article: How does the weather affect the response of porous hose wind noise reduction systems?
How does the weather affect the response of porous hose wind noise reduction systems? Open
<p>In order to reduce the observation of wind and turbulence on infrasound sensors, wind noise reduction filters are in place at most infrasound stations. The use of such filters is essential to obtain low background noise levels, wh…
View article: A climatology of microbarom detections at the Kerguelen Islands: unravelling the ambient noise wavefield
A climatology of microbarom detections at the Kerguelen Islands: unravelling the ambient noise wavefield Open
SUMMARY The ambient infrasonic noise field is complex due to the interference of spatially distributed infrasound sources. Microbaroms are one of the most dominant omnipresent infrasonic sources within this wavefield. These microbaroms are…
View article: Infrasound as a Cue for Seabird Navigation
Infrasound as a Cue for Seabird Navigation Open
Seabirds are amongst the most mobile of all animal species and spend large amounts of their lives at sea. They cross vast areas of ocean that appear superficially featureless, and our understanding of the mechanisms that they use for navig…
View article: A Bird’s‐Eye View on Ambient Infrasonic Soundscapes
A Bird’s‐Eye View on Ambient Infrasonic Soundscapes Open
A method is introduced to reconstruct microbarom soundscapes in absolute values. The soundscapes are compared to remote infrasound recordings from infrasound array I23FR (Kerguelen Island) and in situ recordings by the INFRA‐EAR, a biologg…
View article: Performance Assessment of Geophysical Instrumentation Through the Automated Analysis of Power Spectral Density Estimates
Performance Assessment of Geophysical Instrumentation Through the Automated Analysis of Power Spectral Density Estimates Open
This study describes an automated data quality verification procedure supported by a database of power spectral densities (PSD) estimates for geophysical waveform data. The Royal Netherlands Meteorological Institute (KNMI) manages a 100‐TB…
View article: The INFRA-EAR: a low-cost mobile multidisciplinary measurement platform for monitoring geophysical parameters
The INFRA-EAR: a low-cost mobile multidisciplinary measurement platform for monitoring geophysical parameters Open
Geophysical studies and real-time monitoring of natural hazards, such as volcanic eruptions or severe weather events, benefit from the joint analysis of multiple geophysical parameters. However, typical geophysical measurement platforms st…
View article: A novel approach for the reconstruction of microbarom soundscapes
A novel approach for the reconstruction of microbarom soundscapes Open
<p>A comparison is made between in-situ infrasound recordings in the microbarom band and simulations using a microbarom source model. The recordings are obtained by the 'Infrasound-Logger' (IL), a miniature sensor deployed as a biolo…
View article: The 2010 Haiti earthquake revisited: An acoustic intensity map from remote atmospheric infrasound observations
The 2010 Haiti earthquake revisited: An acoustic intensity map from remote atmospheric infrasound observations Open
In the days following the January 12, 2010 Mw 7 Haiti earthquake the shaking intensity near the epicenter was overestimated and the spatial extent of the potentially damaging shaking was underestimated. This was due to the lack of seismome…
View article: DeepQuake — An application of CNN for seismo-acoustic event classification in The Netherlands
DeepQuake — An application of CNN for seismo-acoustic event classification in The Netherlands Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Other. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints prep…
View article: DeepQuake — An application of CNN for seismo-acoustic event classification in The Netherlands
DeepQuake — An application of CNN for seismo-acoustic event classification in The Netherlands Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Other. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints prep…
View article: DeepQuake -- An application of CNN for seismo-acoustic event classification in The Netherlands
DeepQuake -- An application of CNN for seismo-acoustic event classification in The Netherlands Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Geophysical Research Letters. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn mo…
View article: A low-cost mobile multidisciplinary measurement platform for monitoringgeophysical parameters
A low-cost mobile multidisciplinary measurement platform for monitoringgeophysical parameters Open
Geophysical studies and real-time monitoring of natural hazards, such as volcanic eruptions or severe weather events, benefit from the joint analysis of multiple geophysical parameters. However, typical geophysical measurement platforms st…
View article: Global quieting of high-frequency seismic noise due to COVID-19 pandemic lockdown measures
Global quieting of high-frequency seismic noise due to COVID-19 pandemic lockdown measures Open
Seismic background noise dramatically decreased as a result of lockdown measures in place for mitigating the spread of COVID-19.
View article: Seismically induced ground motions and source mechanism passively retrieved from remote infrasound detections
Seismically induced ground motions and source mechanism passively retrieved from remote infrasound detections Open
<p>The amplitude of ground motions caused by earthquakes and subsurface explosions generally decreases with distance from the epicenter. However, in the near-source region, other factors, e.g., near surface geology, topography, and t…
View article: Climatology reflected by infrasound travel-times sampling the stratosphere in its transition between summer and winter
Climatology reflected by infrasound travel-times sampling the stratosphere in its transition between summer and winter Open
<p>Like seismic waves traveling through the solid earth, infrasound waves traveling through the atmosphere are also sensitive to the medium properties &#8211; in particular to temperature and wind. The exploitation of this inform…