Image of an Ash Particle from the Mt. St. Helens Volcanic Eruption of 1980 (image) University of New Hampshire Share Print E-Mail Caption A series of closely aligned images are used to construct a 3-D model of the particle. Due to the complexity of reconstruction, imaging alone cannot capture the whole particle. Credit Photo credit: Mark Townley/UNH UIC Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.