Principal component analysis based frequency-time feature extraction for seismic wave classification

Jeongki Min; Gwantea Kim; Bonhwa Ku; Jimin Lee; Jaekwang Ahn; Hanseok Ko

doi:10.7776/ASK.2019.38.6.687

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2019 Vol.38, Issue 6 Preview Page Next Page

Research Article

Principal component analysis based frequency-time feature extraction for seismic wave classification 지진파 분류를 위한 주성분 기반 주파수-시간 특징 추출

30 November 2019. pp. 687-696

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Abstract

Conventional feature of seismic classification focuses on strong seismic classification, while it is not suitable for classifying micro-seismic waves. We propose a feature extraction method based on histogram and Principal Component Analysis (PCA) in frequency-time space suitable for classifying seismic waves including strong, micro, and artificial seismic waves, as well as noise classification. The proposed method essentially employs histogram and PCA based features by concatenating the frequency and time information for binary classification which consist strong-micro-artificial/noise and micro/noise and micro/artificial seismic waves. Based on the recent earthquake data from 2017 to 2018, effectiveness of the proposed feature extraction method is demonstrated by comparing it with existing methods.

Keywords

Seismic classification

Seismic feature extraction

Spectrogram

Mel-Spectrogram

Principle component analysis

기존의 지진파 분류 특징은 강진에 초점이 맞추어져 있어서 미소지진과 같은 지진파는 다소 적합하지 않다. 본 연구에서는 강진과 더불어 미소지진, 인공지진, 잡음 분류에 적합한 특징 추출을 위해 주파수-시간 공간 내에서 히스토그램과 주성분 기반 특징 추출방법을 제안한다. 제안된 방법은 지진파의 주파수 관련 정보와 시간 관련 정보를 결합하는 방법을 적용한 히스토그램 기반 특징 추출방법과 주성분 기반 특징 추출방법을 이용하여 지진(강진, 미소지진, 인공지진)과 잡음, 미소지진과 잡음, 미소지진과 인공지진을 이진 분류한다. 2017년~2018년 최근 국내지진 자료와 분류 성능을 토대로 제안한 특징 추출방식의 효용성을 비교 평가한다.

키워드

지진파 분류

지진파 특징 추출

스펙트로그램

멜 스펙트로그램

주성분 분석

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 38
No :6
Pages :687-696
Received Date : 2019-04-01
Revised Date : 2019-06-18
Accepted Date : 2019-10-22
DOI :https://doi.org/10.7776/ASK.2019.38.6.687

The Journal of the Acoustical Society of Korea ISSN:1225-4428(Print) 2287-3775(Online) 한국음향학회지

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