On the Stability of Mantle‐Sensitive P‐Wave Interference During a Secondary Microseismic Event

Abstract Body wave extraction from oceanic secondary microseismic sources with seismic interferometry provides alternative information to better constrain the Earth's structure. However, sources' spatiotemporal variations raise concerns about travel time measurement robustness. Therefore,...

Full description

Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: L. Tomasetto, P. Boué, L. Stehly, F. Ardhuin, H.‐C. Nataf
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2024
Subjects:
ambient noise
body waves
secondary microseisms
seismic interferometry
Geophysics. Cosmic physics
QC801-809
Greenland
Online Access:https://doi.org/10.1029/2023GL108018
https://doaj.org/article/35e9f56e5fb145189f2230c80ba12bd3
Description
Summary:Abstract Body wave extraction from oceanic secondary microseismic sources with seismic interferometry provides alternative information to better constrain the Earth's structure. However, sources' spatiotemporal variations raise concerns about travel time measurement robustness. Therefore, we study the cross‐correlations’ stability during a single oceanic event. This study focuses on 3 days of data and three seismic arrays' combinations between 8 and 11 December 2014 during storm Alexandra, a “weather bomb” event in southern Greenland. We use the WAVEWATCH III hindcast to model P‐wave noise sources and assess the impact of short‐term source variations on cross‐correlations. Model‐based cross‐correlations compared to data show coherent delays to reference 3D Earth models (∼0–3 s) confirming the robustness of the source model which could explain minor travel time variations (≤1 s).

Similar Items