A strong earthquake centered in Afghanistan's Hindu Kush shakes Kabul and wide swathes of Pakistan, with the Euro-Mediterranean Seismological Centre and the US Geological Survey reporting magnitudes between 5.9 and 6.1 and depths from about 100 km to more than 200 km.Authorities in Afghanistan and Pakistan report no immediate official casualties or confirmed structural damage while emergency services in Khyber Pakhtunkhwa place district administrations on alert and begin assessments; earlier smaller quakes were recorded by the European Mediterranean Seismological Centre.Seismologists say intermediate-depth earthquakes can be widely felt but may produce less surface rupture; they warn of landslides, infrastructure stress and aftershocks and urge residents to check for damage and follow safety measures as assessments continue.