[Ads-l] tsunamigenic - 1972 - Japanogreek in English

[Barretts Mail]

(where the Greek comes by way of French, according to Wiktionary: https://en.wiktionary.org/wiki/-gen#English <https://en.wiktionary.org/wiki/-gen#English>)

On 23 March, Brunel University London issued an article (https://www.brunel.ac.uk/news-and-events/news/articles/2016-Ecuador-tsunami-and-tremor-data-could-predict-future-earthquake-impact-analysis-suggests <https://www.brunel.ac.uk/news-and-events/news/articles/2016-Ecuador-tsunami-and-tremor-data-could-predict-future-earthquake-impact-analysis-suggests>) titled “2016 Ecuador tsunami and tremor data could predict future earthquake impact, analysis suggests” and has the following line:

Hundreds have died along the Ecuador-Columbia coast as a result of three large megathrust tsunamigenic earthquakes (ruptures triggering tsunamis) in 1942, 1958 and 1979, rupturing in a consecutive order from south to north.

Not in the online Oxford English dictionaries, tsunamigenic is defined at:

https://earthquake.usgs.gov/learn/glossary/?term=tsunamigenic <https://earthquake.usgs.gov/learn/glossary/?term=tsunamigenic>
Tsunamigenic is referring to those earthquakes, commonly along major subduction zone plate boundaries such as those bordering the Pacific Ocean, that can generate tsunamis.

https://en.wiktionary.org/wiki/tsunamigenic <https://en.wiktionary.org/wiki/tsunamigenic> 
(of an earthquake) capable of generating a tsunami; commonly along major subduction-zone plate boundaries such as those bordering the Pacific Ocean

1. The earliest citation for this word I see on Google is 1971, which appears to be correctly Google-dated:

https://books.google.ca/books?id=VIkhAQAAMAAJ&dq=%22Tsunamigenic%22&focus=searchwithinvolume&q=tsunamigenic <https://books.google.ca/books?id=VIkhAQAAMAAJ&dq=%22Tsunamigenic%22&focus=searchwithinvolume&q=tsunamigenic>
Geophysical Abstracts, issues 296–299
Geological Survey

p. 1140
…of tsunamigenic earthquakes have been estimated for many events…. 

p. 1141
The features of the source mechanism for tsunamigenic earthquakes in the Northwest Pacific are studied by comparing the source mechanism of tsunamigenic and non-tsunamigenic earthquakes. The area studied included Kamchatka, the Kuril Islands, and Japan. Of the 47 earthquakes studied, 18 were tsunamigenic…

p. 1142
For the 29 non-stunamigic earthquakes, the average value of shear horizontal motion is...

2. A contender is “Proces-verbaux” which appears to be 1970:
https://books.google.ca/books?id=040vAAAAYAAJ&q=%22Tsunamigenic%22&dq=%22Tsunamigenic%22&hl=en&sa=X&ved=0ahUKEwjOxZ7n0ovTAhUH7YMKHRsoBl0Q6AEIIzAC

p. 45
The source mechanism of tsunamigenic earthquakes, northwestern region of the Pacific Ocean

p. 55
As a rule, steep fault planes within the sources of tsunamigenic shocks...

3. 10 June 1972:

http://onlinelibrary.wiley.com/doi/10.1029/JB077i017p03097/abstract <http://onlinelibrary.wiley.com/doi/10.1029/JB077i017p03097/abstract>
"Amplitude patterns of tsunami waves from submarine earthquakes"
by Ari Ben-Menahem, Martin Rosenman

Excitation of tsunamis by submarine faults is studied with the purpose of revealing the relations that exist between seismic and tsunamigenic source parameters.

Benjamin Barrett
Formerly of Seattle, WA
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