mainshockn.

Brit.

/ˈmeɪnʃɒk/, U.S.

/ˈmeɪnˌʃɑk/

Origin: Formed within English, by compounding. Etymons: main adj.², shock n.³

Etymology: < main adj.² + shock n.³

Seismology.

A major earthquake that is preceded or followed by one or more smaller earthquakes; the largest of a series of shocks or earthquakes. Cf. principal adj., n., and adv. Compounds.

ΘΚΠ

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

shake1622

shock1693

stroke1815

mainshock1862

1862 Philos. Trans. 1861 (Royal Soc.) 151 676 I had thus visibly presented before me the ‘tremors’ that nearly invariably are described as preceding and following the main shock..in every great earthquake.

1898 Science 18 Feb. 233/2 The noise did not stop with the main shock, but tremors and rumblings..are described as occurring during the entire night.

1930 Times 22 Nov. 11/6 There was a severe earthquake in South-western Albania at 3 o'clock this morning, the main shock lasting 20 seconds.

1987 Nature 14 May 136/2 We suggest that the repeated occurrence of Parkfield foreshocks and mainshock hypocentres within the PPZ is due to the same mechanism that caused the changes following the Coalinga earthquake to be larger within the PPZ than along other parts of the Parkfield section of the San Andreas fault.

1995 Nature 18 May 192/2 Many large aftershocks, and even some mainshocks, occur on unrecognized or minor faults for which it is either impossible or impractical to calculate the ΔCFS following a nearby earthquake.

This is a new entry (OED Third Edition, June 2000; most recently modified version published online March 2022).

单词	mainshock
释义	mainshockn. Brit. /ˈmeɪnʃɒk/, U.S. /ˈmeɪnˌʃɑk/ Origin: Formed within English, by compounding. Etymons: main adj.², shock n.³ Etymology: < main adj.² + shock n.³ Seismology. A major earthquake that is preceded or followed by one or more smaller earthquakes; the largest of a series of shocks or earthquakes. Cf. principal adj., n., and adv. Compounds. ΘΚΠ the world > the earth > structure of the earth > formation of features > convulsion > [noun] > earthquake > shock shake1622 shock1693 stroke1815 mainshock1862 1862 Philos. Trans. 1861 (Royal Soc.) 151 676 I had thus visibly presented before me the ‘tremors’ that nearly invariably are described as preceding and following the main shock..in every great earthquake. 1898 Science 18 Feb. 233/2 The noise did not stop with the main shock, but tremors and rumblings..are described as occurring during the entire night. 1930 Times 22 Nov. 11/6 There was a severe earthquake in South-western Albania at 3 o'clock this morning, the main shock lasting 20 seconds. 1987 Nature 14 May 136/2 We suggest that the repeated occurrence of Parkfield foreshocks and mainshock hypocentres within the PPZ is due to the same mechanism that caused the changes following the Coalinga earthquake to be larger within the PPZ than along other parts of the Parkfield section of the San Andreas fault. 1995 Nature 18 May 192/2 Many large aftershocks, and even some mainshocks, occur on unrecognized or minor faults for which it is either impossible or impractical to calculate the ΔCFS following a nearby earthquake. This is a new entry (OED Third Edition, June 2000; most recently modified version published online March 2022). < n.1862
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