Checking for non-preferred file/folder path names (may take a long time depending on the number of files/folders) ...

This resource contains some files/folders that have non-preferred characters in their name. Show non-conforming files/folders.

This resource contains content types with files that need to be updated to match with metadata changes. Show content type files that need updating.

Seismic refraction data for Pennypack Creek watershed, Philadelphia, PA, USA

Authors:
Owners:		This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource.
Type:	Resource
Storage:	The size of this resource is 1.0 GB
Created:	Aug 07, 2023 at 9:10 p.m. (UTC)
Last updated:	Jul 05, 2025 at 7:54 a.m. (UTC)
Citation:	See how to cite this resource

Sharing Status:	Public
Views:	60
Downloads:	0
+1 Votes:	Be the first one to this.
Comments:	No comments (yet)

Abstract

This data repository includes 5 active source seismic refraction surveys conducted in the Pennypack watershed, Pennsylvania in 2021. The surveys were done with a 24-channel Geode seismic recording system manufactured by Geometrics. We used a 12-lb sledgehammer as the seismic sources. The geophones (sensors to record seismic signals) were in 3m spacing. During the surveys, multiple seismic shots were stacked at the same shot location to increase the quality of the active sources. The first P-wave arrivals were picked using Pickwin by Geometrics. The team used Matlab to generate the P-wave travel time curve from the original Pickwin format. To reliably resolve seismic velocity with depth, the team implemented a Transdimensional Hierarchical Bayesian (THB) framework with reversible-jump Markov Chain Monte Carlo to generate samples from the posterior distribution of velocity structures. This method is based on Huang et al. (2021). This inversion code was written in Matlab and is publicly available in Github (https://github.com/MongHanHuang/THB_rjMCMC) After each model iteration is stable (generally after 1 million iterations), the final velocity structure is the average of the posterior model ensemble. In the repository, each seismic line is saved as a folder. In each data folder, the model file is saved in Matlab format (*.mat) with models plotted in *.png and *.eps formats.

Subject Keywords

Deleting all keywords will set the resource sharing status to private.

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Philadelphia, PA

North Latitude

40.2084°

East Longitude

-75.0194°

South Latitude

40.0390°

West Longitude

-75.1829°

Content

Learn more about the BagIt download

Select a file to see file type metadata.

readme.txt

For each seismic line, there is a text file under "GIS" folder with the coordinate and elevation of the survey line. The locations were registered in the UTM (18S zone) system. To generate new plots, one can load the model file (*.mat) in Matlab first, and open any of the scripts under "tools" in Matlab to generate plots such as contour lines and vertical velocity profiles.

Related Resources

This resource belongs to the following collections:

Title	Owners	Sharing Status	My Permission
Pennypack Creek Data Collection	John Lagrosa IV · Claire Welty	Discoverable & Shareable	Open Access

Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
National Science Foundation	Collaborative Research: Network Cluster: Urban Critical Zone processes along the Piedmont-Coastal Plain transition	2012616
National Science Foundation	Collaborative Research: Network Cluster: Urban Critical Zone processes along the Piedmont-Coastal Plain transition	2011617

Contributors

People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name	Organization	Address
Laura Toran	Temple University	PA, US
Karen Prestegaard	University of Maryland at College Park	Maryland, US
Samantha Volz	University of Maryland at College Park	MD, US
Berit Margaret Hudson Rasmussen	University of Maryland, College Park	MD, USA

How to Cite

Huang, M. (2025). Seismic refraction data for Pennypack Creek watershed, Philadelphia, PA, USA, HydroShare, http://www.hydroshare.org/resource/7286a681d01c453e83af97f6dd0f32bb

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

Comments

There are currently no comments