Updated 8:30 a.m. GMT Tuesday, 27 October, 2015
A powerful earthquake  hit northern Afghanistan earlier, with tremors being felt in Pakistan and India as well. The magnitude 7.5 quake was centred in the mountainous Hindu Kush region, 45 kilometres (28 miles) south-west of Jarm, Afghanistan, the US Geological Survey reported.
Schools in Pakistan's quake-hit areas will remain closed on Tuesday, October 27, due to possible aftershocks, according to local media:
— JAAG TV (@JaagAlerts) October 26, 2015 
After the earthquake, accounts of eyewitnesses started to flood the Internet, as well as sympathies from around the world:
#AFG  One of the scariest experiences. Was stuck inside a building during this massive earthquakes, I have experienced.
— Bilal Sarwary (@bsarwary) October 26, 2015 
— shaimaa khalil BBC (@Shaimaakhalil) October 26, 2015 
— Ahmad Shuja احمدشجاع (@AhmadShuja) October 26, 2015 
— Imran Ghazali (@ImranGhazaliPK) October 26, 2015 
— Arshad Sharif (@arsched) October 26, 2015 
A lot of Twitter users were spreading messages about how to stay safe when an earthquake hits.
— Zarrar Khuhro (@ZarrarKhuhro) October 26, 2015 
— Ali Salman Alvi (@alisalmanalvi) October 26, 2015 
Indian Prime Minister Narendra Modi and Afghan President Ashraf Ghani also expressed themselves on social media after the earthquake. Meanwhile, Pakistani Prime Minister Nawaz Sharif while speaking to the media said that he has cut his trip to London short due to the disaster and should be returning to Pakistan soon.
Spoke to PM Nawaz Sharif & expressed condolences on the loss of lives due to the quake. Offered all possible assistance from India. — Narendra Modi (@narendramodi) October 26, 2015 
Praying for the victims of today's severe earthquake in AFG & the region. V're assessing the situation. Relief/rescue operation is underway. — Ashraf Ghani (@ashrafghani) October 26, 2015 
This video uploaded in Facebook  shows how a ceiling fan shook when the deadly earthquake struck Pakistan earlier today.
Eyewitnesses told news channels on television that the earth beneath their feet shook for many, many seconds.
Massive earth quake felt in F11 Islamabad. Buildings being evacuated. People screaming Allah o Akbar
— Syed Ali Abbas Zaidi (@Ali_Abbas_Zaidi) October 26, 2015 
Major Earthquake has hit our mother land Paksitan. All our prays and well wishes are with the families.May Allah protect all of us. Ameen
— Saeed Ajmal (@REALsaeedajmal) October 26, 2015 
#earthquake  strikes due to our sins,so recite Astaghfar and beg from Allah to forgive our sins.indeed Allah is the best listener
— Sumaira Jamil (@real_sumaira) October 26, 2015 
Hearing of a massive earthquake in Pakistan, Afghanistan & India.Our prayers for everyones safety & well being. May Allah have mercy on all.
— Fakhr-e-Alam (@falamb3) October 26, 2015 
After the earthquake, telephone, mobile and Internet networks came to a stand still in some places:
For 20 minutes mobile network remained choked after earthquake in Delhi.I dread to think what will happen when a deadly disaster strikes us?
— InimitableIndian (@skv_india) October 26, 2015 
Mobile network not available #earthquake 
— Azeem Wyne (@AzeemWyne) October 26, 2015 
Telecom towers do not crash/collapse this easily. The networks r unavailable cuz of serious line blocking (TCH channel blocking) #ProTip 
— Faisal Ahmad Jafri (@faisalahmadj) October 26, 2015 
— Aakiz Bhat (@bhataky) October 26, 2015 
Its natural as the scale of earthquake was huge and people dial up their friends relatives ASAP Cellular network iPAK is severely congested
— Hassan Khan (@hassan_k82) October 26, 2015 
Google announced it had expanded its Person Finder services to Pakistan and Afghanistan following the quake:
— AZ | علی زین (@alimaan) octubre 26, 2015 
After Google, people have also started marking themselves safe on Facebook to inform their friends and family.