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The **`y`** read-only property of the {{domxref("DeviceMotionEventAcceleration")}} interface indicates the amount of acceleration that occurred along the Y
axis in a [`DeviceMotionEventAcceleration`](/en-US/docs/Web/API/DeviceMotionEventAcceleration)
object.
## Value
A `double` indicating the amount of acceleration along the Y axis.
See [Accelerometer values explained](/en-US/docs/Web/API/Device_orientation_events/Detecting_device_orientation) for details.