The porch in font of the cella of a Greek or Roman temple formed by the projection of the side walls and a range of columns between the projections.
Most commonly, the lightning current ceases in about a millisecond for a given stroke, but sometimes there is a continuing current on the order of 100 amps following one or more of the strokes. This is called hot lightning and it is the cause of lightning fires according to Uman.
Most (not all) accelerometer has a sensitivity of 100 mV/g. i.e. for every 100 mV (mille-Volt=0.01 Volt) output, the vibration measured is 1 g.Once you find out your acceleration amplitude, you need then to convert it to velocity (knowing your frequency component).