Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.
In a large bowl, combine cake mix, eggs, and water; blend until smooth.
Pour half of the batter into the prepared pan.
In a separate bowl, mix cream cheese, sugar, and egg until creamy.
Spread the cream cheese mixture over the batter in the pan.
Pour the remaining batter on top of the cream cheese layer.
Drop spoonfuls of strawberry jam on top of the batter.
Using a knife, swirl the jam into the batter to create an 'earthquake' effect.
Bake for 30-35 minutes or until a toothpick comes out clean.
Allow to cool, then serve with whipped cream and fresh strawberries.