Hi, Amanda, Some of these are part of networks that are undergoing maintenance and upgrades as part of our multi-year analog to digital conversion project and should be up and better than ever soon. (Veni/Ani) Others are in areas currently suffering data communication issues with telecom service providers and we are waiting on resolution (Ug/Peulik) Shishaldin had field crews out improving the sites recently and we are working on getting those onto the website for you. We do our best to keep the website webicorder list up to date, but during a busy field season there are a lot of changes. Please check back soon! Thank you -AVO Why are the following seismos completely down and have been For a long time on some of them ADAGDAK almost a year down ANIAKCHAK CLEVELAND OKMOK almost a year down SHISHALDIN All three stations UGASHIK both stations VENIAMIMOF Also, how do you determine that a volcano is steaming or venting? Some have said that seismograms show this activity. Thank you very much in advance