Islamabad , Pakistan ( CNN ) -- An earthquake with a magnitude of 7.2 struck Wednesday morning in a remote area of southwestern Pakistan , but initial reports revealed no major damage . The earthquake occurred at 1:23 a.m. ( 3:23 p.m. Tuesday ET ) at a depth of 84 kilometers ( 52 miles ) , the U.S. Geological Survey said . It was centered 45 kilometers ( 30 miles ) west of Dalbandin , and 1,035 kilometers ( 640 miles ) west-southwest of Islamabad , the USGS said on its website . Arif Mahmood , director of the Pakistan Meteorological Department , put the epicenter at 320 kilometers ( about 200 miles ) southwest of Quetta near Kharan , Balochistan , and said it had been felt in Punjab , Sindh , and Balochistan provinces in Pakistan , as well as parts of Iran and India . Mahmood predicted major aftershocks . `` Earthquakes with such magnitudes in the past have brought on aftershocks , '' he told CNN from Islamabad . Residents near the epicenter in the districts of Kalat , Dalbadin and Kharan told CNN some mud-walled homes were damaged but no one was hurt . An official at Quetta 's Civil Hospital said a female cardiac patient suffered a fatal heart attack during the earthquake . He said two residents raced to the hospital but they proved not to have been injured , just scared . Malik Muhammad Iqbal , the police chief of Balochistan province , said he was aware of no injuries . `` Things in the headquarters started shaking and books fell off the desks , '' Balochistan Police Inspector Sultan Mehmood told CNN in a telephone interview . `` We left the headquarters running into the streets -- scared for our lives . '' In Karachi , Faraz Leghari , director general police , said he had heard no immediate reports of casualties or building damage . USGS initially reported the quake at 7.4 . Quakes of 7.0 to 7.9 are classified as major ; anything over 8.0 is classified as great . In Dubai , about 500 miles southwest of the epicenter , a reporter said he felt a moderate shaking that lasted for about 30 seconds . Usman Zahid , a night manager at Serina Hotel in Quetta , Pakistan , felt the quake . He said it was `` frightening '' and estimated that it lasted about 20 seconds . It left `` broken glass in the kitchen '' and made a chandelier swing , but caused no major damage , he said . People with Twitter accounts in New Delhi , Jaipur and Dehradun -- all in India -- felt the quake . People with Twitter accounts in Bahrain said they felt the quake . In Dubai , `` I was just getting ready to go to bed , '' said Leone Lakhani in Dubai . She said she texted her friends in Abu Dhabi and Bahrain . `` It 's not uncommon for this region to have earthquakes , '' said Kurt Frankel of the Georgia Institute of Technology . It is where two tectonic plates come together , he said . CNN 's Aliza Kassim , Reza Sayah and Journalist Nasir Habib in Islamabad contributed to this story .
NEW : ` ` Scared for our lives , '' police report says . USGS reports a preliminary toll of 6 . The explosion occurred 640 miles west - southwest of Islamabad . It caused windows to break in a hotel in Quetta .