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Applied Sciences
Volume 9
Issue 18
10.3390/app9183860
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Article
Peer-Review Record

Tertiary Waves Measured during 2017 Pohang Earthquake Using an Underwater Glider

Appl. Sci. 2019, 9(18), 3860; https://doi.org/10.3390/app9183860
by Jung-Han Lee 1,2, Sung-Hyub Ko 2, Seom-Kyu Jung 2 and Jong-Wu Hyeon 2,*
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Reviewer 3:
Ella M. Gorbunova
Appl. Sci. 2019, 9(18), 3860; https://doi.org/10.3390/app9183860
Submission received: 18 August 2019 / Accepted: 10 September 2019 / Published: 14 September 2019
(This article belongs to the Special Issue Mapping and Monitoring of Geohazards)

Round 1

Reviewer 1 Report

The work entitled "Tertiary Waves Measured during 2017 Pohang Earthquake using an Underwater Glider" by Jung-Han Lee et al., is a very interesting work that  presents the observations recorded by an underwater glider equipped with a hydrophone observed the acoustic sounds of earthquake occurred on 15 November 2017 05:29:32 (UTC) in the Pohang area. The authors present how they distinguish the earthquake sound from the glider’s operation noise, the noise sources and Sound Pressure Level (SPL) of the underwater glider . The earthquake acoustic signal was distinguished from glider’s self-noises of fin, pumped CTD (conductivity, temperature, depth) and altimeter which are
exist over 100 Hz. The dominant frequencies of the earthquake acoustic signals due to the earthquake were 10 Hz. In this work was clearly shown that the seismic waves converted to Tertiary waves and then it detected by the underwater glider. The results allow constraining the acoustic sound level of the earthquake and suggest that the glider provides an effective platform for enhancing the earth seismic observation systems and monitoring natural and anthropogenic ocean sounds with a potential number of future applications. 

Reviewer 2 Report

This manuscript presents an experimental case study for measuring earthquake using glider. It is an excellent result that the glider proves its usefulness by measuring actual seismic waves, and that the detection mechanism of the glider is verified by using the data of the seismic land stations.

 

The manuscript is well written, and is sufficient to be published in this journal.

I think that the manuscript does not need revision.

Reviewer 3 Report

The article "Tertiary Waves Measured during 2017 Pohang Earthquake using an Underwater Glider" is interest for wide circle of readers. There is a detailed time and frequency analysis of noise levels and earthquake underwater sound. The received results are new in the investigation of the seismic and sound waves propagation after earthquake in the ocean.

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