# Multi directional shaking effect

**URL:** <https://forum.itascainternational.com/t/multi-directional-shaking-effect/2225>\
**Category:** FLAC\
**Created:** [September 3, 2025, 8:45pm UTC](https://forum.itascainternational.com/t/multi-directional-shaking-effect/2225 "2025-09-03T20:45:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Milads](https://avatars.discourse-cdn.com/v4/letter/m/ecccb3/32.png) [@Milads](https://forum.itascainternational.com/u/Milads)\
**Post date:** [September 3, 2025, 8:45pm UTC](https://forum.itascainternational.com/t/multi-directional-shaking-effect/2225/1 "2025-09-03T20:45:55Z")

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I am modeling a seismic site response analysis as a 1D soil column in FLAC2D, applying only the horizontal component of ground motion at the base. Should I apply a scaling factor to the resulting Ru profile to account for multidirectional shaking effects?