seismicadj.

Brit.

/ˈsʌɪzmɪk/, U.S.

/ˈsaɪzmɪk/

Etymology: < Greek σεισμός earthquake ( < σείειν to shake) + -ic suffix. The normal form would be *sismic: compare French sismique.

1. Pertaining to, relating to, characteristic of, connected with, or produced by an earthquake, earthquakes, or earth-vibration. Also, relating to or involving earth vibrations produced artificially by explosions. seismic survey, †(a) a survey of an area in connection with its liability to earthquakes; (b) a survey (for oil and gas) employing seismic methods.

ΘΚΠ

the world > the earth > structure of the earth > formation of features > convulsion > [adjective] > earthquake

terremotive1837

seismic1858

seismical1869

earthquaking1881

seismotic1889

principal1899

macroseismic1903

primary wave1919

seismal1977

1858 R. Mallet in Rep. Brit. Assoc. i. 7 The period of the year at which seismic action appears to be greatest.

1858 R. Mallet in Rep. Brit. Assoc. i. 18 Whether, as a seismic region, Northern Africa have a centre disturbance of its own [etc.].

1877 Rudler in Encycl. Brit. VII. 611/1 The depth of the seismic focus is easily determined. For since the waves radiate from this focus, any two wave-paths when produced backwards will meet at the seismic centre.

1887 G. H. Darwin in Fortn. Rev. Feb. 267 Regions subject to earthquakes, or seismic areas.

1887 Trans. Seismol. Soc Japan 10 36 The first method of avoiding earthquake motion in a given district is to make a seismic survey of that area.

1935 Geol. Natural Gas (Amer. Assoc. Petroleum Geologists) 664 Seismic surveys isolated a relatively small area with structural closure on the upthrown side of the fault.

1941 Bull. Amer. Assoc. Petroleum Geologists 25 1261 The unsolved problems in the field of seismic surveying require for their solution a more complete understanding of the properties of the earth strata.

1944 A. Holmes Princ. Physical Geol. xii. 206 Near the middle of the sheet the ice has been shown by seismic methods..to be over 8,000 feet thick.

1969 Times 16 July 4/2 The scientific equipment bay where the seismic experiment and the laser rangefinding device are stowed.

1972 Daily Tel. 1 May 2/7 Seismic studies show these areas could be almost as rich in oil and gas as the North Sea.

1979 Jrnl. Royal Soc. Arts 127 405/1 The first stage in oil and gas exploration is usually in the form of seismic surveys.

2. figurative.

ΚΠ

1962 S. E. Finer Man on Horseback xii. 222 These bands of successor-states form so many seismic zones of preternatural military eruption.

1979 A. Draper Fish 10 Churchill's seismic decision to empty the national coffers in one bold operation..was only taken when the Germans were hammering at the door.

Compounds

seismic prospecting n. prospecting by investigating the propagation in rock of artificially created elastic waves.

ΚΠ

1929 Trans. Amer. Inst. Mining & Metall. Engineers 81 626 In seismic prospecting in general, fewer data are employed than in pure seismology.

1963 C. A. Heiland Geophysical Explor. ix. 439 Uses of seismic prospecting in mining have been few.

seismic reflection n. the reflection of elastic waves at boundaries between different rock formations; usually attributive.

ΚΠ

1932 Trans. Amer. Inst. Mining & Metall. Engineers 97 469 A second application of the method of least squares is the outlining of a buried structure by seismic reflections.

1940 Bull. Amer. Assoc. Petroleum Geologists 24 1391 The sequence of methods of examination..is likely to be that of reconnaisance geology, detailed geologic mapping,..and core-drilling or seismic reflection examination.

1977 A. Hallam Planet Earth 29/2 In the search for oil-bearing strata, geophysicists make use of the seismic~reflection technique to the virtual exclusion of all other exploration methods.

seismic refraction n. the refraction of elastic waves on passing between formations of rock having different seismic velocities; usually attributive.

ΚΠ

1934 Trans. Amer. Inst. Mining & Metall. Engineers 110 473 (heading) Seismic refraction methods as applied to shallow overburdens.

1979 Nature 3 May 56/2 In 1977 an 800-km long seismic refraction profile was shot across Iceland and along the south~eastern flank of the Reykjanes Ridge.

seismic sea-wave n. = tsunami n.

ΘΚΠ

the world > the earth > water > flow or flowing > wave > movement of waves > [noun] > convulsion caused by eruption

watershake1577

seaquake1680

water wave1851

tidal wave1878

tsunami1897

seismic sea-wave1905

1905 C. Davison Study Recent Earthquakes vi. 163 (heading) Seismic sea~waves.

1944 A. Holmes Princ. Physical Geol. xvii. 362 Strong submarine earthquakes are followed by seismic sea waves.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XIV. 355/1 Explosions or collapses taking place under water may cause water waves, sometimes of great size. These fall within the class of tsunamis (seismic sea waves).

seismic velocity n. the velocity of propagation of elastic waves in a particular rock.

ΚΠ

1935 Bull. Amer. Assoc. Petroleum Geologists 19 1 The idea that the longitudinal seismic velocity of sediments increases with the age of the sediments has been held rather generally for some time.

1977 A. Hallam Planet Earth 11/1 Observed seismic velocities..allow the variation of density with depth in the Earth to be determined.

seismic wave n. an elastic wave in the earth produced by an earthquake or by artificial means.

ΚΠ

1900 H. Nagaoka Elastic Constants of Rocks & Velocity of Seismic Waves (Publ. Earthquake Investigation Comm. in Foreign Languages No. 4) 65 The investigation of the seismic waves affords the best means of feeling the pulse of the interior of the earth.

1925 M. Mühlberg in I. A. Stigand Outl. Occurrence & Geol. of Petroleum 217 The transmissive velocity for seismic (as also acoustic) waves is different in various media.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XII. 147/1 Seismic waves from explosions and earthquakes occur in the frequency range from about 100 to 1/3000 cps.

Derivatives

ˈseismical adj. = sense 1.

ΘΚΠ

the world > the earth > structure of the earth > formation of features > convulsion > [adjective] > earthquake

terremotive1837

seismic1858

seismical1869

earthquaking1881

seismotic1889

principal1899

macroseismic1903

primary wave1919

seismal1977

1869 Spectator 6 Nov. 1291 Considerable atmospheric and seismical disturbance.

1905 Athenæum 29 July 137/3 The cartography, geological, magnetical, seismical, &c., of Italy.

ˈseismically adv. with regard to earthquakes; by seismic methods.

ΘΚΠ

the world > the earth > structure of the earth > formation of features > convulsion > [adverb] > earthquake

seismically1858

macroseismically1938

1858 R. Mallet in Rep. Brit. Assoc. i. 67 A third..volcanic region, of which I am not aware that anything is known seismically.

1904 C. E. Dutton Earthquakes xiv. 245 (note) This locality is certainly a seismically sensitive one to-day.

1941 Bull. Amer. Assoc. Petroleum Geologists 25 1258 The average depth to which the Gulf Coast has been seismically surveyed.

1978 Nature 27 Apr. 791/2 The absence of a seismically detectable Tertiary-Quaternary sediment cover.

This entry has not yet been fully updated (first published 1911; most recently modified version published online March 2022).

单词	seismic
释义	seismicadj. Brit. /ˈsʌɪzmɪk/, U.S. /ˈsaɪzmɪk/ Etymology: < Greek σεισμός earthquake ( < σείειν to shake) + -ic suffix. The normal form would be sismic: compare French sismique. 1. Pertaining to, relating to, characteristic of, connected with, or produced by an earthquake, earthquakes, or earth-vibration. Also, relating to or involving earth vibrations produced artificially by explosions. seismic survey, †(a)* a survey of an area in connection with its liability to earthquakes; (b) a survey (for oil and gas) employing seismic methods. ΘΚΠ the world > the earth > structure of the earth > formation of features > convulsion > [adjective] > earthquake terremotive1837 seismic1858 seismical1869 earthquaking1881 seismotic1889 principal1899 macroseismic1903 primary wave1919 seismal1977 1858 R. Mallet in Rep. Brit. Assoc. i. 7 The period of the year at which seismic action appears to be greatest. 1858 R. Mallet in Rep. Brit. Assoc. i. 18 Whether, as a seismic region, Northern Africa have a centre disturbance of its own [etc.]. 1877 Rudler in Encycl. Brit. VII. 611/1 The depth of the seismic focus is easily determined. For since the waves radiate from this focus, any two wave-paths when produced backwards will meet at the seismic centre. 1887 G. H. Darwin in Fortn. Rev. Feb. 267 Regions subject to earthquakes, or seismic areas. 1887 Trans. Seismol. Soc Japan 10 36 The first method of avoiding earthquake motion in a given district is to make a seismic survey of that area. 1935 Geol. Natural Gas (Amer. Assoc. Petroleum Geologists) 664 Seismic surveys isolated a relatively small area with structural closure on the upthrown side of the fault. 1941 Bull. Amer. Assoc. Petroleum Geologists 25 1261 The unsolved problems in the field of seismic surveying require for their solution a more complete understanding of the properties of the earth strata. 1944 A. Holmes Princ. Physical Geol. xii. 206 Near the middle of the sheet the ice has been shown by seismic methods..to be over 8,000 feet thick. 1969 Times 16 July 4/2 The scientific equipment bay where the seismic experiment and the laser rangefinding device are stowed. 1972 Daily Tel. 1 May 2/7 Seismic studies show these areas could be almost as rich in oil and gas as the North Sea. 1979 Jrnl. Royal Soc. Arts 127 405/1 The first stage in oil and gas exploration is usually in the form of seismic surveys. 2. figurative. ΚΠ 1962 S. E. Finer Man on Horseback xii. 222 These bands of successor-states form so many seismic zones of preternatural military eruption. 1979 A. Draper Fish 10 Churchill's seismic decision to empty the national coffers in one bold operation..was only taken when the Germans were hammering at the door. Compounds seismic prospecting n. prospecting by investigating the propagation in rock of artificially created elastic waves. ΚΠ 1929 Trans. Amer. Inst. Mining & Metall. Engineers 81 626 In seismic prospecting in general, fewer data are employed than in pure seismology. 1963 C. A. Heiland Geophysical Explor. ix. 439 Uses of seismic prospecting in mining have been few. seismic reflection n. the reflection of elastic waves at boundaries between different rock formations; usually attributive. ΚΠ 1932 Trans. Amer. Inst. Mining & Metall. Engineers 97 469 A second application of the method of least squares is the outlining of a buried structure by seismic reflections. 1940 Bull. Amer. Assoc. Petroleum Geologists 24 1391 The sequence of methods of examination..is likely to be that of reconnaisance geology, detailed geologic mapping,..and core-drilling or seismic reflection examination. 1977 A. Hallam Planet Earth 29/2 In the search for oil-bearing strata, geophysicists make use of the seismic~reflection technique to the virtual exclusion of all other exploration methods. seismic refraction n. the refraction of elastic waves on passing between formations of rock having different seismic velocities; usually attributive. ΚΠ 1934 Trans. Amer. Inst. Mining & Metall. Engineers 110 473 (heading) Seismic refraction methods as applied to shallow overburdens. 1979 Nature 3 May 56/2 In 1977 an 800-km long seismic refraction profile was shot across Iceland and along the south~eastern flank of the Reykjanes Ridge. seismic sea-wave n. = tsunami n. ΘΚΠ the world > the earth > water > flow or flowing > wave > movement of waves > [noun] > convulsion caused by eruption watershake1577 seaquake1680 water wave1851 tidal wave1878 tsunami1897 seismic sea-wave1905 1905 C. Davison Study Recent Earthquakes vi. 163 (heading) Seismic sea~waves. 1944 A. Holmes Princ. Physical Geol. xvii. 362 Strong submarine earthquakes are followed by seismic sea waves. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XIV. 355/1 Explosions or collapses taking place under water may cause water waves, sometimes of great size. These fall within the class of tsunamis (seismic sea waves). seismic velocity n. the velocity of propagation of elastic waves in a particular rock. ΚΠ 1935 Bull. Amer. Assoc. Petroleum Geologists 19 1 The idea that the longitudinal seismic velocity of sediments increases with the age of the sediments has been held rather generally for some time. 1977 A. Hallam Planet Earth 11/1 Observed seismic velocities..allow the variation of density with depth in the Earth to be determined. seismic wave n. an elastic wave in the earth produced by an earthquake or by artificial means. ΚΠ 1900 H. Nagaoka Elastic Constants of Rocks & Velocity of Seismic Waves (Publ. Earthquake Investigation Comm. in Foreign Languages No. 4) 65 The investigation of the seismic waves affords the best means of feeling the pulse of the interior of the earth. 1925 M. Mühlberg in I. A. Stigand Outl. Occurrence & Geol. of Petroleum 217 The transmissive velocity for seismic (as also acoustic) waves is different in various media. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XII. 147/1 Seismic waves from explosions and earthquakes occur in the frequency range from about 100 to 1/3000 cps. Derivatives ˈseismical adj. = sense 1. ΘΚΠ the world > the earth > structure of the earth > formation of features > convulsion > [adjective] > earthquake terremotive1837 seismic1858 seismical1869 earthquaking1881 seismotic1889 principal1899 macroseismic1903 primary wave1919 seismal1977 1869 Spectator 6 Nov. 1291 Considerable atmospheric and seismical disturbance. 1905 Athenæum 29 July 137/3 The cartography, geological, magnetical, seismical, &c., of Italy. ˈseismically adv. with regard to earthquakes; by seismic methods. ΘΚΠ the world > the earth > structure of the earth > formation of features > convulsion > [adverb] > earthquake seismically1858 macroseismically1938 1858 R. Mallet in Rep. Brit. Assoc. i. 67 A third..volcanic region, of which I am not aware that anything is known seismically. 1904 C. E. Dutton Earthquakes xiv. 245 (note) This locality is certainly a seismically sensitive one to-day. 1941 Bull. Amer. Assoc. Petroleum Geologists 25 1258 The average depth to which the Gulf Coast has been seismically surveyed. 1978 Nature 27 Apr. 791/2 The absence of a seismically detectable Tertiary-Quaternary sediment cover. This entry has not yet been fully updated (first published 1911; most recently modified version published online March 2022). < adj.1858
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