Surface wave magnitude

M s magnitudesurface wave surface wave magnitude scaleM w M'' s magnitudesMssurface wave magnitude scalesurface wave scale
The surface wave magnitude (M_s) scale is one of the magnitude scales used in seismology to describe the size of an earthquake.wikipedia
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Earthquake

earthquakesseismic activityseismic
The surface wave magnitude (M_s) scale is one of the magnitude scales used in seismology to describe the size of an earthquake.
The surface wave magnitude was developed in the 1950s as a means to measure remote earthquakes and to improve the accuracy for larger events.

Richter magnitude scale

Richter scalemagnitudeRichter magnitude
Surface wave magnitude was initially developed in the 1950s by the same researchers who developed the local magnitude scale M L in order to improve resolution on larger earthquakes:
In 1956, Gutenberg and Richter, while still referring to "magnitude scale", labelled it "local magnitude", with the symbol, to distinguish it from two other scales they had developed, the surface wave magnitude (M S ) and body wave magnitude (M B ) scales.

Seismology

seismicseismologistseismologists
The surface wave magnitude (M_s) scale is one of the magnitude scales used in seismology to describe the size of an earthquake.

Rayleigh wave

Rayleigh wavesRayleighRayleigh surface waves
It is based on measurements in Rayleigh surface waves that travel primarily along the uppermost layers of the Earth.

China

People's Republic of ChinaChineseCHN
It is currently used in People's Republic of China as a national standard(GB 17740-1999) for categorising earthquakes.

Guobiao standards

GuobiaoGBGuobiao code
It is currently used in People's Republic of China as a national standard(GB 17740-1999) for categorising earthquakes.

Particle displacement

displacementdisplaceParticle amplitude
where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s, Δ is the epicentral distance in °, and

Euclidean vector

vectorvectorsvector addition
where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s, Δ is the epicentral distance in °, and

Micrometre

μmµmmicrometers
where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s, Δ is the epicentral distance in °, and

Frequency

frequenciesperiodperiodic
where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s, Δ is the epicentral distance in °, and

Second

ssecmegasecond
where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s, Δ is the epicentral distance in °, and

Epicenter

epicentreepicentralepicentral distance
where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s, Δ is the epicentral distance in °, and

Degree (angle)

°degreesdegree
where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s, Δ is the epicentral distance in °, and

Seismic magnitude scales

magnitudeseismic scalebody wave magnitude
The surface wave magnitude (M_s) scale is one of the magnitude scales used in seismology to describe the size of an earthquake.

1988 Armenian earthquake

Spitak earthquake1988 earthquake1988 Spitak earthquake
The 1988 Armenian earthquake, also known as the Spitak earthquake (Սպիտակի երկրաշարժ, Spitaki yerkrasharj), occurred on December 7 at 11:41 local time with a surface wave magnitude of 6.8 and a maximum MSK intensity of X (Devastating).

April 2015 Nepal earthquake

2015 Nepal earthquakeearthquake on 25 April 2015Nepal earthquake
It occurred at 11:56 Nepal Standard Time on 25 April 2015, with a magnitude of 7.8M w or 8.1M s and a maximum Mercalli Intensity of VIII (Severe).

Humanitarian response to the 2015 Nepal earthquake

response to the April and May 2015 Nepal earthquakehelp to the Nepali people following an earthquakehumanitarian response to the Nepal earthquake
An earthquake struck Nepal at 11:56:54 NST on 25 April 2015 with a moment magnitude (M w ) of 7.8 or 8.1M s and a maximum Mercalli Intensity of IX (Violent).

2008 Sichuan earthquake

Sichuan earthquakeWenchuan earthquakeGreat Sichuan earthquake
Measuring at 8.0 M s (7.9 M w ), the earthquake's epicenter was located 80 km west-northwest of Chengdu, the provincial capital, with a focal depth of 19 km.

List of earthquakes in Japan

Seismicity in Japanearthquake to hit Japana long history of earthquakes
As indicated below, magnitude is measured on the Richter magnitude scale (M L ) or the moment magnitude scale (M w ), or the surface wave magnitude scale (M s ) for very old earthquakes.

1976 Bali earthquake

1976-07-15Bali earthquakeearthquake in 1976
The 1976 Bali earthquake occurred at 15:13 local time on 14 July with a surface wave magnitude of 6.5.

1896 Sanriku earthquake

18961896 Tsunamimagnitude 8.5 earthquake
The 8.5 magnitude earthquake occurred at 19:32 (local time) on June 15, 1896, approximately 166 km off the coast of Iwate Prefecture, Honshu.

1605 Nankai earthquake

1605 Keichō Nankaido earthquake1605 Keichō Nankaidō earthquake
It had an estimated magnitude of 7.9 on the surface wave magnitude scale and triggered a devastating tsunami that resulted in thousands of deaths in the Nankai and Tōkai regions of Japan.

1979 Bali earthquake

1979-12-18subsequent earthquake
The 1979 Bali earthquake occurred at 03:58 local time on 18 December with a surface wave magnitude of 6.3.

115 Antioch earthquake

an earthquake115 AD earthquake115 earthquake
It had an estimated magnitude of 7.5 on the surface wave magnitude scale and an estimated maximum intensity of XI (Extreme) on the Mercalli intensity scale.