Relevant Articles

Towards Tsunami Early-Warning with Distributed Acoustic Sensing: Expected Seafloor Strains Induced by Tsunamis

This research paper evaluates the feasibility of using Distributed Acoustic Sensing (DAS) on seafloor fiber-optic cables for real-time tsunami early warning by analyzing the theoretical sensitivity to pressure-induced deformations like the compliance and Poisson's effects. Supported by 3-D physics-based simulations, the study demonstrates that advanced DAS interrogators can discern tsunami signals from background seismic noise within minutes of an earthquake, providing a cost-effective path toward high-density offshore monitoring. 

This study is critical for determining the relationship between wave height of a tsunami and the induced signal of the DAS cables. An important step for implementing a tsunami simulation accurately is correctly gauging the signal recieved by the interrogator and the deformation of the cable itself based on wave height data. This paper presents three factors that impact this conversion.

Tsunami Source of the 2011 Tohoku-Oki Earthquake, Japan: Inversion Analysis Based on Dispersive Tsunami Simulations

This study utilizes inversion analysis of waveforms from offshore GPS and ocean-bottom pressure gauges, including critical near-field records, to estimate the initial tsunami water height and coseismic slip of the 2011 Tohoku-Oki earthquake. The research concludes that dispersive tsunami simulations are essential for accurate modeling, revealing significant slip both at a 20 km depth and in a shallower region (<10 km) near the trench.

The figures provided by this paper been integral to my project's tsunami simulation. Figure 3a was used to determine the initial condition applied by the simulation. Figure 2 was used to validate the simulation at specific coordinates.

Submarine Cable Deep-Ocean Observation of Mega-Thrust Earthquake and Tsunami with 44,000 100-m Spaced Sensors

This research demonstrates the conversion of a 4400 km operational submarine telecommunications cable into a high-resolution seismic array of 44,000 sensors spaced every 100 meters. The system successfully achieved the first real-time fiber-optic detection of a tsunami in the deep ocean and recorded a magnitude 8.8 earthquake, validating the use of existing subsea infrastructure for global early-warning networks.