How do I pick events on absolute impedance and other non-zero mean data?
![](https://media.screensteps.com/image_assets/assets/003/321/326/original/20313df2-a8a0-4211-a943-17c7e6ff9509.png)
- From the Volume tab, load impedance or velocity volume (continuous, non-zero mean data).
![](https://media.screensteps.com/image_assets/assets/003/321/328/original/89e0acf0-9dd5-48a2-9aed-d5c87e5df403.png)
- Go to the Process tab and apply a Bandpass Process to remove the low-frequency signal.
- Select the impedance or velocity volume in the Volume search box.
- Choose High-pass Filter type.
![](https://media.screensteps.com/image_assets/assets/003/321/330/original/ec7b56e3-031c-41d2-84b2-7f09f5c68aec.png)
- Go to the Horizon tab and pick a new horizon.
- In the horizon picking settings, choose the appropriate event type. In this example, Zero Decreasing was used to identify this top-sand.
![](https://media.screensteps.com/image_assets/assets/003/321/332/original/0641739d-4dde-4c24-92e2-e1035d1d9828.png)
- Arbline showing Horizon Picked on Band-limited P-Impedance.