The epicenter of the 9.0 magnitude quake was under the Indian Ocean near the west coast of the Indonesian island of Sumatra (from the deadliest tsunami in history)

To determine the epicenter of the 9.0 magnitude quake that caused the deadliest tsunami in history, you would need to analyze seismic data. Here's how you can find information about the epicenter:

1. Seismic Network: Start by checking data from seismic monitoring networks like the U.S. Geological Survey (USGS), the Pacific Tsunami Warning Center (PTWC), or local Indonesian agencies. These organizations continuously monitor earthquake activities around the world.

2. Magnitude and Timing: Look for reports or databases that provide details about the earthquake's magnitude and timing. A 9.0 magnitude earthquake is significant and would likely be well-documented.

3. Location Coordinates: Once you have identified the earthquake event, note the latitude and longitude coordinates provided in the data. These coordinates specify the location of the earthquake's epicenter.

4. Google Maps or GIS: Use the obtained coordinates to pinpoint the location on a map. You can use online mapping services like Google Maps or geographic information system (GIS) software to visualize the earthquake's epicenter.

Based on historical records and reports, the epicenter of the 9.0 magnitude earthquake that triggered the deadliest tsunami in history was under the Indian Ocean near the west coast of the Indonesian island of Sumatra.