Table: earthquakes_romania
Columns: date
time_utc
epicenter
magnitude
depth
intensity

Question: What is the depth of the quake that occurred at 19:48?
SQL: SELECT "depth" FROM earthquakes_romania WHERE "time_utc" = '19:48'

Question: What is the magnitude with epicenter at Vrancea County, unknown intensity and which happened at 06:36?
SQL: SELECT "magnitude" FROM earthquakes_romania WHERE "epicenter" = 'vrancea county' AND "intensity" = 'unknown' AND "time_utc" = '06:36'

Question: Where was the epicenter of the quake on December 1, 2012?
SQL: SELECT "epicenter" FROM earthquakes_romania WHERE "date" = 'december 1, 2012'