> For the complete documentation index, see [llms.txt](https://jonas.gitbook.io/seismo_rain/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jonas.gitbook.io/seismo_rain/seismic-data/picking-the-right-seismic-stations.md).

# Picking the right seismic stations

Since ground vibrations caused by rainfall occur at high frequencies, it's necessary to use a seismic sensor with a sample rate exceeding 200 Hz. Introducing the geophone, a seismic sensor akin to a seismometer but specialized for detecting seismic waves in significantly higher frequency ranges.

## 2A : LArge-n Seismic Survey in Oklahoma seismic network

Inspired by the paper published by [Hua et al., 2023](https://www.nature.com/articles/s41598-023-38008-w#Bib1), we chose the temporary "[2A: Large-n Seismic Survey in Oklahoma](https://www.fdsn.org/networks/detail/2A_2016/)" seismic network from the International Federation of Digital Seismograph Networks (FDSN) for our project. This website serves as a valuable tool for seismologists seeking suitable seismic networks for their research.

Each station within this network is equipped with the Geo Space GS30CT/FairfieldNodal ZLAND 1C geophone, with a sampling rate of 500 Hz, perfectly suited for our needs. Comprehensive information regarding each station within the network can be accessed via the following link: 

{% hint style="info" %}
<https://www.fdsn.org/> -> Networks ->  2A -> 2A : LArge-n Seismic Survey in Oklahoma -> Data Access -> [Full fedcatalog information for this network](http://service.iris.edu/irisws/fedcatalog/1/query?net=2A\&starttime=2016-01-01\&endtime=2016-12-31\&format=text\&includeoverlaps=true\&nodata=404)
{% endhint %}

<figure><img src="/files/UiOdHOEpMYYgtZIxyDkH" alt=""><figcaption><p><strong>The location of the 2A seismic network is represented as the red cluster, located on the Northern border of the state of Oklahoma (source: Google Map)</strong></p></figcaption></figure>


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