The site is being excavated to a depth of 9m in some parts to create a bowl for the track and permanent lower tiers of seating containing 25,000 seats.
It is being dug at a rate of over 30,000 cubic metres a week.
Other parts of the site are being raised by 5m in order to complete the bowl topography on what is a natural slope.
At "ground level" above the bowl, temporary structures housing 65,000 seats will be erected with a walkway laid around the perimeter.
The field, host to Javelin, long-jump and shot-put glory in 2012, will be located at the centre of the bowl.
Surrounded by the Lower Lea Valley's waterways, the stadium will be connected to the rest of the London 2012 site by a series of bridges.
The Stratford international station is also taking shape, with the box structure complete.
Good progress is also being made with the Aquatics Centre, which can be seen here with Stratford international in the background.