fokianti.blogg.se - Silent start

Silent start free#

If quakes begin in a cascade, there will be no way to predict which small quake is going to start a chain reaction leading to a large quake.īecause few instruments are set up to detect subtle effects before an earthquake, it is difficult to study the nucleation phase and find out which model is more accurate. They said that if earthquakes begin with a pre-slip nucleation phase, it might be possible to detect that phase ahead of time and predict which quakes are going be large ones. Ellsworth and Beroza presented data to show that the larger and more extensive the pre-slip, the more likely that the ensuing quake also would be large. This pre-slip nucelation phase would be silent, too slow or too subtle to pick up with seismic instruments. They showed that instead of cascading, earthquakes might start with a pre-slip stage, hours to days before the earthquake. His findings lend support to an explanation of the observed weak beginning of earthquakes, the seismic nucleation phase, proposed by Ellsworth and Beroza in Science magazine on May 12, 1995. Dodge reported the results at the American Geophysical Union meeting in San Francisco on Wednesday, Dec. Geological Survey in Menlo Park also was a co-author of the study. Instead of triggering each other, both the foreshocks and the main shock appeared to be triggered by some other mechanism.

"Instead of taking the main shock closer to failure, the foreshocks took the main shock further away from failure," said Dodge's co-author, Gregory Beroza, associate professor of geophysics. But when Stanford graduate student Douglas Dodge analyzed the mechanics of foreshock sequences preceding six recent California earthquakes, he found that the small quakes were more likely to relieve the stress that led to the main quake rather than to increase it. Indeed, according to one scientific model of nucleation - the start of an earthquake - a tiny rupture triggers a small quake, which then triggers a larger one in a cascade of increasing size. STANFORD - Most people think of foreshocks as the small earthquakes that trigger a big quake. We’ll be happy to chat with you and point you towards tools that can help.Study of foreshocks lends support to concept of a silent start for quakes Study of foreshocks lends support to concept of a silent start for quakes

Silent start free#

Group similar items together or place exciting items with less-exciting ones so that you can set higher starting bids without negatively affecting competition.įinally, feel free to contact us if you have any other questions about setting up your silent auction.

Use a tool like BidBeacon to help you, and to manage other important parts of the auction like closing times and payments.

Set appropriate bid increments to keep the competition going throughout your event.

The harder it is to find the item’s FMV, the more you’ll need to rely on information about your guests and the money they’re willing to spend.

Set your starting bid at 25-40% of the item’s FMV.

Next, calculate the item’s FMV by looking online to see what other people are already paying for similar products.

Find the item’s SRP first, so you can figure out what you’re likely to get for it at auction (usually about 50%).

We recommend setting your starting bids at 25–40% of the FMV for each item, depending on your fundraising goals and type of guests at your event.įor example, guests with more disposable income may be inclined to bid on items with higher starting bids-but if you have more guests in lower income brackets, you’ll get more competition by making your starting bids lower.Īt the end of the day, here’s what you need to remember about setting starting bids for any item at your silent auction: Most silent auctions yield around 50% of an item’s suggested retail price, so the SRP for an item is more useful for helping you calculate what you can expect to make than for helping you set starting bids.įMVs, on the other hand, are vital for calculating starting bids on most items. Obviously, you want to raise as much money as possible for your charity fundraiser or organization-but you still need to stay realistic about how much guests will be willing to pay for your items. However, these numbers are important reference points you’ll need to find the ideal starting bid for each item. Unfortunately, setting the perfect starting bids for your items isn’t as simple as just using the FMV or SRP.