Assessment of infrasound signals recorded on seismic stations and infrasound arrays in the western United States using ground truth sources

Park, Junghyun; Hayward, Chris; Stump, Brian W.

doi:10.1093/gji/ggy042

Cited by 8 publications

(4 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, for signals longer than a few minutes and for sources outside the network, stacking is more challenging and thus the true locations become difficult to resolve (Figure ). In such cases, phase association and variable window lengths may be advantageous (Park et al, ), as well as allowing for multiple celerities at each time step between grid nodes and stations.…”

Section: Discussionmentioning

confidence: 99%

“…RTM has been used with seismic data (e.g., Arrowsmith et al, ; Shearer, ; Xu et al, ), as well as infrasonic ground‐coupled airwaves (e.g., Walker et al, , , with TA data). Alternatives to RTM have been proposed for seismoacoustic event location with TA data; for example, de Groot‐Hedlin and Hedlin (, ) and Park et al () employed a mesh of subnetworks in an array processing scheme. Other recent methods for locating volcanic infrasound using combinations of single sensors are available (e.g., Jones & Johnson, ; Kim & Lees, ; Pinsky et al, ; Szuberla et al, ).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Remote Detection and Location of Explosive Volcanism in Alaska With the EarthScope Transportable Array

et al. 2020

View full text Add to dashboard Cite

The current deployment of the EarthScope Transportable Array (TA) in Alaska affords an unprecedented opportunity to study explosive volcanic eruptions using a relatively dense regional seismoacoustic network. Infrasound monitoring has demonstrated utility for the remote (>250 km range) detection and characterization of volcanic explosions, but previous studies have used relatively sparse regional or global networks. Seventy explosive events from the locally unmonitored Bogoslof volcano (2016-2017) provide a unique validation data set to examine the ability of the TA and other regional networks to detect and locate remote explosive volcanic eruptions in Alaska. With a simple envelope-based reverse time migration (RTM) technique, we are able to detect and locate more than 72% of the 61 Bogoslof infrasound events detected by the Alaska Volcano Observatory. Notably, RTM using only sparse regional infrasound arrays produces results similar to when incorporating the extensive single-sensor TA network, likely due to favorable signal-to-noise ratios, seasonal propagation conditions, and source-receiver geometries. Our implementation also detects and locates explosive eruptions from Cleveland volcano, Alaska, and Bezymianny volcano, Kamchatka, as well as infrasound from nonvolcanic events such as earthquakes. We characterize the success of the RTM algorithm and associated parameter choices using receiver operating characteristic curves, event detection rates, and location accuracy. Our methods are useful for explosive volcanic and nonvolcanic event detection and localization using real-time data and for scanning continuous waveform data archives.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Remote Detection and Location of Explosive Volcanism in Alaska With the EarthScope Transportable Array

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Geometric ray tracing is a computationally fast method based on high-frequency eikonal and transport approximations (e.g., [54]) which take into account atmospheric specifications and is a reference tool used to study infrasound propagation in the atmosphere (e.g., [55][56][57][58][59]). While geometric ray tracing has some inherent limitations, such as neglecting diffraction and scattering, it provides a robust approximation of infrasound propagation, which can be leveraged towards source localization and atmospheric sounding (e.g., [55,56,60]).…”

Section: Ray Tracingmentioning

confidence: 99%

Isolating the Source Region of Infrasound Travel Time Variability Using Acoustic Sensors on High-Altitude Balloons

Silber

Bowman

2023

Remote Sensing

View full text Add to dashboard Cite

High-altitude balloons carrying infrasound sensor payloads can be leveraged toward monitoring efforts to provide some advantages over other sensing modalities. On 10 July 2020, three sets of controlled surface explosions generated infrasound waves detected by a high-altitude floating sensor. One of the signal arrivals, detected when the balloon was in the acoustic shadow zone, could not be predicted via propagation modeling using a model atmosphere. Considering that the balloon’s horizontal motion showed direct evidence of gravity waves, we examined their role in infrasound propagation. Implementation of gravity wave perturbations to the wind field explained the signal detection and aided in correctly predicting infrasound travel times. Our results show that the impact of gravity waves is negligible below 20 km altitude; however, their effect is important above that height. The results presented here demonstrate the utility of balloon-borne acoustic sensing toward constraining the source region of variability, as well as the relevance of complexities surrounding infrasound wave propagation at short ranges for elevated sensing platforms.

show abstract

“…This is an issue of relevance to explosion monitoring or to the forensic analysis of other signals, such as industrial and military explosions or potential terrorist incidents (e.g., Koper et al, ). As highlighted in recent papers (e.g., Arrowsmith et al, ; Park, Hayward, et al, ), the fusion of seismic and acoustic data provides unique constraints for studying a broad range of topics. In this paper, we explore and present on a method to address the problem of yield/depth trade‐off through data fusion by combining both seismic and acoustic information in the source analysis.…”

Section: Introductionmentioning

confidence: 99%

Seismoacoustic Analysis of Chemical Explosions at the Nevada National Security Site

Pasyanos

Kim

2019

JGR Solid Earth

View full text Add to dashboard Cite

In recent years, two sets of chemical explosions have been conducted at the Nevada National Security Site: six explosions from Phase I of the Source Physics Experiment and four explosions from the Forensics Surface Events. We have estimated the explosive yield and depth-of-burial/height-of-burst of both from the synthesis of seismic and low-frequency acoustic data. Analysis of the seismic signal is performed using a waveform envelope technique. Using seismic data only, however, there is a trade-off between the yield and depth or height of the explosion, which becomes especially acute for near-surface events. This trade-off between yield and depth/height can be broken by including complementary analysis of the acoustic signal using the acoustic waveform inversion method. The acoustic signal also has a strong trade-off between a yield and depth/height, but the slope is opposite that of the seismic for near-surface events. We use a likelihood function to combine the seismic and acoustic analysis and improve our estimates of yield and depth/height for these sets of explosions. The results are generally consistent with the known parameters, but can be improved upon by higher-frequency seismic analysis and improved acoustic impulse scaling for large-scaled depths-of-burial. These events serve as prime examples of data fusion from multiple data streams. The challenge will be to apply the method to events at longer regional distances where the seismic signals will include phases traveling in the upper mantle, and the acoustic signals will be recorded as infrasound signals, which are subject to atmospheric variability.Plain Language Summary We combine seismic waves traveling in the solid Earth with acoustic waves traveling in the air to estimate the explosive yield of a series of chemical explosions conducted in Nevada. We find that combining the two data sets significantly improves on the analysis performed with either seismic waves or acoustic waves alone.

show abstract

Assessment of infrasound signals recorded on seismic stations and infrasound arrays in the western United States using ground truth sources

Cited by 8 publications

References 31 publications

Remote Detection and Location of Explosive Volcanism in Alaska With the EarthScope Transportable Array

Remote Detection and Location of Explosive Volcanism in Alaska With the EarthScope Transportable Array

Isolating the Source Region of Infrasound Travel Time Variability Using Acoustic Sensors on High-Altitude Balloons

Seismoacoustic Analysis of Chemical Explosions at the Nevada National Security Site

Contact Info

Product

Resources

About