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The concept of Earthquake Duration Magnitude – originally proposed by E. Bisztricsany in 1958 using surface waves only - is based on the realization that on a recorded earthquake seismogram, the total length of the seismic wavetrain – sometimes referred to as the CODA – reflects its size. Thus larger earthquakes give longer seismograms [as well as stronger seismic waves] than small ones. The seismic wave interval measured on the time axis of an earthquake record - starting with the first seismic wave onset until the wavetrain amplitude diminishes to at least 10% of its maximum recorded value - is referred to as "earthquake duration". It is this concept that Bisztricsany first used to develop his Earthquake Duration Magnitude Scale employing surface wave durations.

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  • The concept of Earthquake Duration Magnitude – originally proposed by E. Bisztricsany in 1958 using surface waves only - is based on the realization that on a recorded earthquake seismogram, the total length of the seismic wavetrain – sometimes referred to as the CODA – reflects its size. Thus larger earthquakes give longer seismograms [as well as stronger seismic waves] than small ones. The seismic wave interval measured on the time axis of an earthquake record - starting with the first seismic wave onset until the wavetrain amplitude diminishes to at least 10% of its maximum recorded value - is referred to as "earthquake duration". It is this concept that Bisztricsany first used to develop his Earthquake Duration Magnitude Scale employing surface wave durations. (en)
  • 지진 지속시간 규모란 1958년 헝가리의 지진학자 E. 비스트리처니가 처음으로 계산한 지진의 지진 규모를 측정하는 하나의 척도로, 기록된 지진의 지진파형 중 표면파에서 CODA파라고 부르는 파의 총 길이를 통해 규모를 측정하는 계산법이다. 규모가 큰 지진일수록 작은 지진보다 더 오랫동안 지진파형이 기록된다는 점을 이용한다. 측정된 지진파에서 최초로 지진파가 발생했을 때 파동의 최대 진폭이 반사되면서 점차 감쇠하다 최대진폭의 10%가 되는 시간을 "지진 지속시간"이라고 부른다. 이 개념은 비스트리처니가 표면파의 지속시간을 이용한 지진 지속시간 규모를 개발할 때 처음으로 사용한 개념이다. 이 규모는 국지적, 지역에 국한되는 지진의 규모를 측정할 때 유용하며 지진계의 최대 측정 규모를 넘거나(구 아날로그 체계 지진계의 문제) 최대 파동의 진폭을 측정하기 어려운 매우 강력한 지진, 혹은 최대 진폭이 명확하게 드러나지 않는 매우 약한 지진 양쪽에 유용하다. 매우 먼 곳에서 일어난 지진이더라도 흔들림이 지속된 시간(과 그 진폭)을 가지고 지진의 총 에너지를 계산할 수 있다는 장점이 있다. 지진의 지속시간 측정은 현대에 와서 Mwpd나 mBc 등의 규모 단위에서도 같이 사용된다. (ko)
  • 地震持续时间震级(英语:earthquake duration magnitude)是一种地震度量,缩写为MD。用记录振动持续时间测定震级,比用最大振幅测定震级能更好地符合实际情况。例如,对于限幅不太明显的地震,用最大振幅法测得的震级显然偏小,而用振动持续时间来测量震级却是比较可靠的。 (zh)
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  • The concept of Earthquake Duration Magnitude – originally proposed by E. Bisztricsany in 1958 using surface waves only - is based on the realization that on a recorded earthquake seismogram, the total length of the seismic wavetrain – sometimes referred to as the CODA – reflects its size. Thus larger earthquakes give longer seismograms [as well as stronger seismic waves] than small ones. The seismic wave interval measured on the time axis of an earthquake record - starting with the first seismic wave onset until the wavetrain amplitude diminishes to at least 10% of its maximum recorded value - is referred to as "earthquake duration". It is this concept that Bisztricsany first used to develop his Earthquake Duration Magnitude Scale employing surface wave durations. (en)
  • 地震持续时间震级(英语:earthquake duration magnitude)是一种地震度量,缩写为MD。用记录振动持续时间测定震级,比用最大振幅测定震级能更好地符合实际情况。例如,对于限幅不太明显的地震,用最大振幅法测得的震级显然偏小,而用振动持续时间来测量震级却是比较可靠的。 (zh)
rdfs:label
  • Earthquake duration magnitude (en)
  • 지진 지속시간 규모 (ko)
  • 地震持续时间震级 (zh)
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