A Japanese land survey institution says two major earthquakes that rocked Turkey and Syria on Monday caused crustal deformations across the affected areas, with one greater than 2 meters in length.

The Geospatial Information Authority of Japan analyzed radar data collected on Wednesday by the Advanced Land Observing Satellite-2, also known as Daichi-2.

The institution says it confirmed crustal deformations of at least 10 centimeters throughout the affected region, particularly in areas near the epicenters in Turkey.

The group says it found deformations of up to 1 meter near the East Anatolian Fault. The fault lies about 50 kilometers northeast of the epicenter of the first quake, which had a magnitude of 7.8.

The institution says it discovered a deformation of 2 meters or more near the epicenter of the second quake. The magnitude-7.5 quake struck more than nine hours after the first one. It says the deformation occurred along an active fault near the epicenter.

The institution believes active faults shifted near the surface during the quakes, triggering violent jolts.

Munekane Hiroshi of the institution's Geography and Crustal Dynamics Research Center says there are more deformations and they are spread out more widely than typical for inland quakes. He says this is why there was such extensive damage.

He adds the analysis covers only part of the affected regions and that the institution will broaden its scope to paint a fuller picture of the crustal deformations.