here s ayhan irfanoglu, head of civil engineering at purdue university in indiana. what lessons were missed? what lessons with with coding and enforcing these were an issue is a local issue. whatever you design does not get built properly and you end up with a vulnerable structure. when you see the levels of devastation. these were two very strong quakes. would you have expected more resilience from the building structure had those lessons been learned from the 1999 earthquake? been learned from the 1999 eartthake? . , ., been learned from the 1999 eartthake? . , . ., earthquake? certainly, at least far awa from earthquake? certainly, at least far away from the earthquake? certainly, at least far away from the epicentre, - earthquake? certainly, at least far away from the epicentre, the - earthquake? certainly, at least far| away from the epicentre, the heavy ground motion sites we would have expected better performance. the ground motions we have seen are really at the high end of
intensity we have seen before so it is a very strong ground motions near the fault zone. 50. is a very strong ground motions near the fault zone. the fault zone. so, really weak strong ground the fault zone. so, really weak strong ground motions - the fault zone. so, really weak strong ground motions as - the fault zone. so, really weak strong ground motions as you | the fault zone. so, really weak i strong ground motions as you are saying. going forward, at the moment what we are looking at it is hard to imagine how all of that clears away. but i guess, what do you hope in terms of when this area does come to rebuild? we terms of when this area does come to rebuild? ~ ., , ., , terms of when this area does come to rebuild? ~ .,, ., , ., rebuild? we hope that they would build structures rebuild? we hope that they would build structures that rebuild? we hope that they would build structures that are - rebuild? we hope that they would build structures that are robust. l build stru
strong quakes, but would you have expected more resilience from the building structure had those lessons been learnt from the 1999 earthquake? been learnt from the 1999 earthauake? . , ., been learnt from the 1999 earthauake? . , . ., earthquake? certainly, at least far awa from earthquake? certainly, at least far away from the earthquake? certainly, at least far away from the epicentre, - earthquake? certainly, at least far away from the epicentre, we - earthquake? certainly, at least far - away from the epicentre, we expected better away from the epicentre, we expected better performance. the ground motions better performance. the ground motions we have seen are really at the high motions we have seen are really at the high end of the intensity we have the high end of the intensity we have seeh the high end of the intensity we have seen before, so it is a very strong ground motion. just going forward, strong ground motion. just going forward. what strong ground motion. j
was designed. the same thing happened again tonight. my understanding is the alerts it did not go out in l.a. a magnitude that was estimated from the warning system was 6.2. the initial magnitude estimate, it s below that threshold. the system is not perfect. what was experienced here in the pasadena l.a. area, these are not damaging ground motions. in ridgecrest, that is damaging ground shaking. they are feeling it. reporter: is there a chance for an even larger went and as a doctor jones said, there is a 5% chance this could be followed by an even larger quak quake. the number of 5% is usually
above what the stipulated shaking revealed. so it was just the way that the system was designed. in fact, the same thing happened again tonight. my understanding the alerts did not go out on shake alert la. the magnitude that was estimated with an early warning system was 6.2. so the initial magnitude estimate was too low. consequently, the intensities were below thatthreshold. the system is not perfect. what was experienced in the pasadena, l. a. area were not damaging ground motions. what s going on in up in ridge crest, those are damaging ground motions. these folks are really feeling it. what is the chance of another large quake like this or even larger tonight? well, as dr. jones had said, there s a 5% chance that in could be followed by an even