RE: previous post
All this work has been completed previously. Go here: www.quakewatch.net AND www.suspicioujs0bservers.org. The "Ring the Bell" incident WAS human caused… all else due to natural circumstances. Very well explained. ALSO >> In order to determine which is natural and which is 'man-caused' you have to look at exact earth wave patterns. These two websites have the answers to what you are looking for. Its all very scientific etc. Thanks.