Yesterday afternoon we suddenly were in the midst of a earthquake! Really amazing I have to say and rather scary. I was upstairs studying when evertything started shaking, the walls and the bed I was on. A lamp I had to hold until I came to the conclusion this was not ok. Than I shouted to Ben downstairs what was going on because this wasn't just a passing truck. He shouted to run outside straight away. There we stood litterly shaken! Unfortuanatly I only was wearing a underpants but luckily no passing traffic! 
Reports from newspapers:
Bangkok shaken by Laos quake, minor damage in North
REPORT BANGKOK POST
A powerful earthquake measuring 6.1 on the Richter scale, with its epicentre in northern Laos, jolted many parts of the country yesterday, shaking buildings in downtown Bangkok and toppling spires of ancient temples in Chiang Rai.
No injuries were reported as a result of the quake which lasted about 30 seconds.
Tremors were also felt in Hanoi in Vietnam, but there were no reports of any major damage or injuries there or in Laos around the epicentre of the quake.
Many buildings in Bangkok and other affected provinces shook although no visible structural damage was reported.
Apichai Chvajarernpun, chief of the Mineral Resources Department, said the widespread tremors could be felt from Chiang Rai to Bangkok as the source of the quake was 10 km below ground, which is considered shallow.
The department detected the earthquake at 3.56pm. It was centred in northern Laos, only 95km from Chiang Rai. A 6.1 magnitude quake is usually capable of damaging buildings.
''This could be the biggest quake ever experienced in the North,'' said Smith Dharmasarojana, chairman of the National Disaster Warning Administration Committee.
Other northern provinces, such as Chiang Mai and Phayao, also felt tremors of differing intensities. In Phayao's Phu Sang sub-district, a villager said his house was ''swaying like a hammock''.
Big earthquake in Laos shakes up Thailand but does little damage
The quake was felt more strongly in northern Thailand, with Smith Dharmasaroja, chairman of the National Disaster Warning Center, saying it had been the strongest one known to hit the area.
He told Thai TV Channel 3 there had been almost 10 aftershocks, and warned people not to return to cracked houses for at least 24 hours. He said landslides were also a possible threat.
The quake was clearly felt in the northern Thai city of Chiang Mai, a popular tourist destination 259 kilometers (161 miles) southwest of the epicenter, but a spokesman for the Disaster Mitigation and Prevention Center there said there were no reports of damage.
In Mae Sai district of Chiang Rai province, the border area of Thailand nearest to the epicenter, district chief Pongkan Piyapongtulakom said there were no initial reports of damage or casualties but the officials were still surveying buildings.
"We could feel it very strongly here," he said. "It became stronger and went on for about five minutes. It was the strongest I have felt and I have been here for more than seven years."