Using Cross-correlation of Seismic Ambient Noise to Determine the Crustal Structure along the Anbar-Karbala-Samawa Axis

Hasan Alash; Najah Abd

Article Details

Using Cross-correlation of Seismic Ambient Noise to Determine the Crustal Structure along the Anbar-Karbala-Samawa Axis

Authors:

Hasan Alash | Najah Abd

Publisher:

Iraqi Geologists Union (Union of Iraqi Geologists)

Journal:

The Iraqi Geological Journal Vol.58 Issue 2F, pp.86-101

Document Type:

Article

Publication Date:

12/2025

Document Language:

English

Document ID (Org No.):

2001836948

pISSN:

2663-8754

Keywords:

Abstract:

 This study utilises the cross-correlation of seismic ambient noise to determine the crustal structure along the Anbar-Karbala-Samawa Axis. The data processing involved four main steps: data preparation, cross-correlation and stacking, measuring dispersion curves, and inversion. By analysing data from three broadband seismic stations (ANB1, KAR2, and SAM2) from the Mesopotamian Seismological Network, Empirical Green's Functions were retrieved from long-period ambient noise data records. The Multi-Filter Technique was then applied to these EGFs using the do_mft program to measure Rayleigh wave phase and group dispersion curves, which describe how wave velocity varies with frequency. These dispersion curves were subsequently inverted using the SURF96 program, which employs an iterative, linearized, least-squares technique. This process transforms the dispersion curves into a one-dimensional shear-wave velocity model of the subsurface. From the final velocity models, the sedimentary thickness is measured to be approximately 12 km, whereas the Moho depth is roughly 44 km. The findings show the effectiveness of ambient noise cross-correlation in providing information about the Earth's interior and refining the understanding of the crustal structure in the study area.

Article Details

Using Cross-correlation of Seismic Ambient Noise to Determine the Crustal Structure along the Anbar-Karbala-Samawa Axis

Authors:

Hasan Alash | Najah Abd

Publisher:

Iraqi Geologists Union (Union of Iraqi Geologists)

Journal:

The Iraqi Geological Journal Vol.58 Issue 2F, pp.86-101

Document Type:

Article

Publication Date:

12/2025

Document Language:

English

Document ID (Org No.):

2001836948

pISSN:

2663-8754

Ambient noise

Cross-correlation

SURF96

Do_mft

Crustal structure

Issues

Article Details

Using Cross-correlation of Seismic Ambient Noise to Determine the Crustal Structure along the Anbar-Karbala-Samawa Axis

Authors: Hasan Alash | Najah Abd

Publisher: Iraqi Geologists Union (Union of Iraqi Geologists)

Journal: The Iraqi Geological Journal Vol.58 Issue 2F, pp.86-101

Document Type: Article

Publication Date: 12/2025

Document Language: English

Document ID (Org No.): 2001836948

pISSN: 2663-8754

Ambient noise

Cross-correlation

SURF96

Do_mft

Crustal structure

Issues

Authors:

Hasan Alash | Najah Abd

Publisher:

Iraqi Geologists Union (Union of Iraqi Geologists)

Journal:

The Iraqi Geological Journal Vol.58 Issue 2F, pp.86-101

Document Type:

Article

Publication Date:

12/2025

Document Language:

English

Document ID (Org No.):

2001836948

pISSN:

2663-8754