7 March 2023
The remarkable landslide in an olive grove near to Hatay, triggered by the Turkey-Syria earthquakes
Yesterday marked one month since the 6 February 2023 Turkey-Syria earthquakes, which have had such a devastating impact across a wide area of both countries. Investigations of the coseismic landslides continue – I recommend the Twitter account of the SLATE-landSLide Assessment TEam (@SLATE_landslide), a group of Turkish landslide specialists who are providing updates on their work investigating the major failures.
One landslide that has attracted some interest is the large failure in an olive grove near to Tepehan, which some people have termed the Hatay landslide. The location of the failure is [36.161, 36.222]. My friends at Planet have very kindly captured before and after satellite imagery of the failure using the high resolution SkySat instrument. This is the site before the landslide:-
Whilst this is the same site after the earthquake:-
I have created a slider that should allow you to compare the before and after images:-
In the media there has been some confused reporting about this landslide, with some mistaking the landform for the fault rupture. This is a block slide type of failure, probably on a weak layer in a dip slope, which has allowed parts of the olive grove to remain intact despite large displacements. This block diagram from the USGS explains the concept well:-
Robin Lacassin has a good tweet that highlights the main features of the landslide close to Hatay:-
The #landslide triggered by the 6Feb2023 #earthquake near Tepehan (Hatay) is clear on HR satellite images 👇🏽.
Huge fissures at landslide head were sometimes falsely claimed to be the tectonic fault rupture (a quite common mistake in the days following earthquakes). https://t.co/WjnCU03KTz pic.twitter.com/HHuBSATDpO
— Robin Lacassin – @rlacassin.bsky.social (@RLacassin) February 27, 2023
I will look forward to reading more about this failure once it has been investigated fully.
Acknowledgement and reference
Many thanks once again to the wonderful team at Planet.
Planet Team (2023). Planet Application Program Interface: In Space for Life on Earth. San Francisco, CA. https://www.planet.com/