At the Earth Observatory of Singapore (EOS. It researches on earthquakes, volcanoes and tsunamis, something like the USGS), Professor David Ong was worried. He was studying the tremor that struck yesterday. He checked the location and depth. The computer gathered the data. What he saw shocked him. The computer showed: Magnitude 3.8 earthquake struck on Sunday, 21st November 2015. Location, 15km beneath Singapore near Macritchie reservoir. Impossible! Singapore wasn't located anywhere close to a tectonic plate. He double checked the data. The data showed the same thing. He called his colleague Sam. "Sam, we have a problem."

Doctor Sam Wong quickened his footsteps. He heard what Professor David said and was rushing to the earthquake research room. When he reached, he quickly checked the computer data. He was also shocked. Thoughts filled his mind as to what could've caused the tremor. He could think of nothing. Suddenly he thought of Yellowstone, a super volcano located in the United States. He shrugged of the thought. That couldn't be happening in Singapore. There was no history of earthquakes or volcanoes in Singapore. The only earthquakes that could be felt was from Indonesia. Sam said to David, "What do you think could've caused the earthquake?"

"I'm not sure. Maybe from construction of underground mrt tunnels that could've disturbed the ground. But even so the earthquake cannot be so big," David replied.

"We've got to find out what is happening. The news will most probably be reporting of this incident soon and when that happens we must give the public and answer," David told Sam.

"Gotcha," Sam replied. Both of them started working to find out what caused the tremor by checking instruments and data. However, by the time they had finished sifting through the data that they had, they still had no clue. They were perplexed and were left scratching their heads.

Suddenly, the alarm started screeching and they felt the ground shaking. They ducked under the table, waiting for the tremor to stop. After about 10 seconds, everything was over. They checked the seismometer and the computer. The computer showed worrying data. "WARNING, 4.0 magnitude earthquake struck on Monday, 22nd November at 0910 hours, depth, 20km beneath Singapore. Location, Kent ridge park. They were stunned. They knew immediately that this wasn't good. Something was amiss, and that something was big. They needed to get to the bottom of this, fast.