Making_Glocal

自作地震計記録で地球規模の走時曲線を作る　2026-06-05　Yoshio Okamoto

筆者がかつて運用していた，タイの科学高校KVISに置いた地震計と，筆者自宅の地震計記録のうち，地球内部構造を通り抜けてきた地震波位相が顕著なものをピックアップし，地球規模で走時曲線を作る実習の資料を作成したので紹介する．

I have compiled a set of data for a practical exercise to create a global travel time curve. This compilation features records from a seismometer I once operated at KVIS, a top science high school in Thailand, and from a seismometer at my home, specifically selecting those with distinct seismic wave phases that have traveled through the Earth’s interior. I would like to introduce this resource.

Resources: You can get HERE.

How to make?

1) At first, Split the seismograms into small segments for each observation sites.
2) Place those waveforms along the line representing the distances between observation sites
3) Read the P-wave travel times from the AK135 table and shift the waveforms to their respective arrival times.
4) And then glue the seismogram on to the graph.

1, Travel-Time base chart

2. Click HERE you can get 3_page Seismograms

3. Inner Seismic Ray Path

3. Procesure

Cutting seismograms and paste with glue using AK135 Travel-Time table

Now completed!