Jamaicaquake

[GirlySports]

7.7 seems pretty big for this part of the globe.

[Knut]

https://twitter.com/nbcnews/status/1...340000256?s=21

Tsunami warnings have gone out

[Lubicon]

Originally Posted by GirlySports

7.7 seems pretty big for this part of the globe.

Size/strength wise it doesn't seem out of line with what history suggests. However quakes are relatively infrequent here despite this being a tectonic plate boundary.

https://en.wikipedia.org/wiki/List_o..._the_Caribbean

https://en.wikipedia.org/wiki/Caribbean_Plate

[BurningYears]

Plates of the Caribbean.........

[Buff]

Originally Posted by Lubicon

Size/strength wise it doesn't seem out of line with what history suggests. However quakes are relatively infrequent here despite this being a tectonic plate boundary.

https://en.wikipedia.org/wiki/List_o..._the_Caribbean

https://en.wikipedia.org/wiki/Caribbean_Plate

How do they know the magnitude of the quakes in the 1600s, 1700s and 1800s when the scales were developed in the 1900s?

[troutman]

"Earth-quake-a... Whole lotta shaking goin' on down there..."

[getbak]

Are there any Arby's left in Calgary? This thread title makes me think of the Jamocha Shake.

Originally Posted by Buff

How do they know the magnitude of the quakes in the 1600s, 1700s and 1800s when the scales were developed in the 1900s?

They look at reports from the time period to see what sorts of effects were experienced at various locations during the quake and extrapolate based on the distance from the epicenter and what they know of the expected damage caused by different magnitudes of earthquakes.

https://slate.com/news-and-politics/...years-ago.html