FlightRadar24 has a more detailed chart of the telemetry with a link to the granular data: "We have processed the granular ADS-B data received from #JT610. Last signal was received at 23:31:56.030 UTC from -5.81346, 107.12698 at 425 ft AMSL. Final ADS-B data received from the aircraft indicates a high rate of descent."
(FlightRadar24: "A word of caution: ADS-B data can be incredibly useful, but to speculate on a cause at this point would be conjecture. The Flight data recorder and Cockpit voice recorder will play an important role in the investigation, as always. #JT610")
https://twitter.com/flightradar24/status/1056758281929154565
(FlightRadar24: "A word of caution: ADS-B data can be incredibly useful, but to speculate on a cause at this point would be conjecture. The Flight data recorder and Cockpit voice recorder will play an important role in the investigation, as always. #JT610")