to tell us more about this exciting new frontier we have a caltech professor and experimental physicist who joins us on the phone. you are hereed because i have been getting so many questions from my children about this blackhole. tell us why in particular this image is so exciting. think children have the best questions, so the reason that they are excited is the same reason i am excited. just aok at it and it is thing you would never see on earth. the laws of physics that are going on and making the kind of image are the kinds that you only hear about in harry potter novels or comic books. emily: here are some questions from my six-year-old son. where did it come from? where do black holes come from? rana: see this is what i am saying. these are the best questions. this is exactly what we talk about in astronomy conference. where do black holes come from ? and everyone has their own opinions. this is one of the observations that we think will help us figure this out. the only way to get a big blackhole is to put together a bunch of little things. and this thing is billions of times he

to tell us more, we have a caltech professor. >> the kind you only hear about in harry potter novels comic books. emily: here are some questions from my son. where did it come from? where do black holes come from? >> these are the best questions. this is exactly what we talk about in astronomy. where do black holes come from and everyone has their own opinions. this is one of the observations that we think will help us figure this out. the only way to get a big blackhole is to put together a bunch of little things. this thing is billions of times heavier than the earth or than the sun which is thousands of times heavier than the earth. it is a lot of things have smashed together. one of the things we really don't know is do black holes make delicacies or do galaxies make black holes? for the heaviest ones, one of the opinions is that when these are flying around in the center of the galaxy, it is really crowded. occasional pull tracks on each other and eventually slows things down and they all fall down and land on the blackhole. part of the reason you see all of this glowing orange

>> reporter: living in california, it's a topic that caltech faculty member is used to talking about. >> i find it fascinating. >> reporter: but experiencing a powerful earthquake is another thing. according to the recent research the state may be in a earthquake alone. >> i hear people wanting to plan and prepare for that because it's something that can be potentially catastrophic. >> reporter: in a study released today and author said california is experiencing seismic silence. >> the next century seems like it needs to be busier. it could be six earthquakes or more. >> reporter: in the research, that is 2 1/2 years in the making. the study data from faults that carry the most traffic. they include the san andreas, and heyward faults. he concluded that there has not been enough ground rupturing earthquakes in the last 100 years. and one is overdue. >> these are earthquakes where the ground surface is actually physically broken. if you went there and there was a fence line that was initially straight, it would be offset. >> reporter: one of the ground rupturing quakes mentioned in th

scientist at caltech in southern california have re- examined historic seismic data, using a new algorithm running on a supercomputer. they identified nearly 2 million tiny earthquakes, undetected until now. micro quakes. usg says this new tool will help the bay area as well. >> we have the same problems, of faults that connect to each other like the hayward and rogers creek fall, were getting better images on how they connect over the years. same for hayward and calaveras falls >> faults. >> it happened almost around the clock underground and scientists believe this will lead to a better understanding of when a fault may snap. it also was useful for studying swarms. >> we usually have earthquake swarms and san ramon with 10 times as much data we can track them accurately and you better forecasts on how they are behaving. >> duties millions of small earthquakes help reduce stress on the major faults? >>it's important to release energy on the faults if we do we need 30 times as many. >> you don't feel them or see them but they may be the first clue to understand the how and why of earthquak

scientists at caltech have re- examined the historic seismic data using a new algorithm running on the supercomputer. they have identified nearly 2 million tiny earthquakes undetectable until now. usgs says this new tool will help the bay area too. >> we have the same problems of faults that connect to each other like h and the rodgers creek salt and we get better images of how they connect over the years. >> reporter: studying these micro quakes that happen almost round-the-clock deep underground, scientists believe this will lead to a better understanding of when a fault may snap. it is also useful for studying swarm. >> san ramon regularly has earthquakes forms. with ten times as much data we would be able to track them that much more accurately and do better forecast for the future. >> reporter: do these millions of small earthquakes reduce stress on major faults? >> if they were really important to releasing energy on the faults we need to have 30 times as many. >> reporter: you don't see them come you don't feel them but they may be the first clue to better understanding how and