And Ike made landfall as a Category 2, however, the storm surge was more like that of a Category 4 or 5. I watched from afar as the Search and Rescue Teams from Texas along with National Guard, Coast Guard and Active Duty Helos pulled a lot of people to safety when it struck them that the National Hurricane Center had missed the big threat.
But you are arguing apples versus oranges. Hurricane scale is an indicator of potential damage based mainly on wind speed and it effect on structures. EQ intensity scales don't indicated similar things. Then again you have to ask yourself is a hurricane a Geyer or Kruspe wrap? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, March 11, 2011 5:57 PM To: [email protected] Subject: Re: [Hornlist] BBC Phil in Japan That all depends, too. Katrina, when it hit the MS Gulf Coast, was technically only a category 3. Yet, we all saw the damage it did. Even hurricane categories don't always mean a certain amount of damage since they can vary based on size, where they hit, how they hit, etc. Charley, for example, exploded at the last minute and effected a very small area. Andrew, when it hit, moved very quickly and raked the entire portion of south Florida. -William In a message dated 3/11/2011 6:48:08 P.M. Eastern Standard Time, [email protected] writes: Wandering way afield from horn stuff. Yes, but, in the disaster response business it really is good to know, "how big is big and how bad is bad." Hurricane Categories are a very useful tool to understand how big, how bad. Much more useful in figuring out what you need to send than current EQ ratings. I know if it's a Category 4 or 5 hurricane, I'll be pulling a lot of 12+ hour days. A Cat 1 or 2 on the other hand means maybe 2 days of 24 hour ops, just to make sure the storm doesn't change her mind. Then back to normal. On Mar 11, 2011, at 5:04 PM, [email protected] wrote: > Well I believe the reason for this is because a direct measure of energy > doesn't exactly relate to how that energy is released. A good case in point > involves thermonuclear exchange. I personally hope it never happens, but it > was a brief hobby of mine a few years ago to study how the bomb was > developed, how it worked, and what our arsenals meant for 'humanity'. It was very > eye opening to learn these things. > > It's a common misconception that if it full exchange were to happen that > there would be one large strike for each major city, but the truth is the US > and USSR Arsenals numbered in the tens of thousands because they found out > that there would be much more damage from a 'swarm' of lesser yield weapons > than one large one. Additionally, they found out that there would be more > damage from an explosion in the air rather than on the ground. > > Earthquakes work the same way I suppose. Energy released is pretty much a > direct measurement, but how it translates into what damage it causes depends > highly on how much energy is transferred to the surface, or if there is > soil liquefaction, or a resulting tsunami, the resultant ground acceleration, > etc. > > -William > > > In a message dated 3/11/2011 3:27:46 P.M. Eastern Standard Time, > [email protected] writes: > > It is probably a good tool for geophysical purposes but problematic in the > disaster response business, case in point Christchurch. > > It would nice to have something that indicates scope of damage. > > On Mar 11, 2011, at 12:59 PM, Jeffrey S Barker <[email protected]> > wrote: > >> Earthquake magnitude is determined from the amplitude of ground motion > as >> measured on a seismograph. In principle, energy should be proportional > to >> amplitude squared, just as sound intensity is proportional to pressure >> squared. However, Richter noted that the energy released by an > earthquake >> does not simply scale up. A larger earthquake ruptures a larger fault, > over >> a larger range of depths, and over a longer time duration. So, in > defining >> the magnitude scale, Richter empirically related magnitude to energy >> according to: log E = 11.4 + 1.5 M (for energy in ergs). Thus, for > every >> increase in magnitude by 1 unit, energy increases by 10^(1.5), or a > facor of >> 31.6. >> >> Jeff Barker >> (seismologist and horn player) >> >>> >>> Date: Fri, 11 Mar 2011 14:22:51 +0100 >>> From: Hans Pizka <[email protected]> >>> Subject: Re: [Hornlist] BBC Phil in Japan >>> To: The Horn List <[email protected]> >>> Message-ID: <[email protected]> >>> Content-Type: text/plain; charset=utf-8 >>> >>> >>> > xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxx >>> The energy release of an earthquake, which closely correlates to its >>> destructive power, scales with the 3?2 power of the shaking amplitude. > Thus, >>> a difference in magnitude of 1.0 is equivalent to a factor of 31.6 ( = >>> (101.0)(3 / 2)) in the energy released; a difference in magnitude of > 2.0 is >>> equivalent to a factor of 1000 ( = (102.0)(3 / 2) ) in the energy > released. >>> >>> > xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxx >>> But in Japan there was a 7.2 quake two days ago, three shocks yesterday > & >>> 42 shocks today between 05:46 A.M. & 01:49 P.M. local Munich time, means >>> 02:46 P.M. and 11:46 P.M. in Tokyo. >>> >>> But news did not talk about yesterdays heavy quake in Yuennan SW China > with >>> 25 dead & over 250 injured, but CCTV9 broadcasted the Japan disaster for >>> several hours in their English program. >>> >>> Somebody out there to explain the above calculation in simplified words, >>> please ? >>> >>> >>> > ############################################################################ ######################## >>> >>> Am 11.03.2011 um 13:49 schrieb William Gross: >>> >>>> This is a major disaster for Japan, with tsunami affecting the >>> Philippines. >>>> Warnings have gone out to Gaum, Hawaii, Indonesia and the US West > Coast. >>>> >>>> Early reports have it as an 8.9, by comparision the Northridge EQ that >>> his >>>> the LA area in 1994 was a 6.7. This equake is about 100 times more >>>> powerful. >>>> >>>> On Fri, Mar 11, 2011 at 6:25 AM, Lawrence Yates > <[email protected] >>>> wrote: >>>> >>>>> I've just heard that the BBC Philharmonic Orchestra (based here in >>>>> Mancheter) who are on tour in Japan at the moment are safe after the >>>>> earthquake. Apparently they were going across a bridge in their coach >>> when >>>>> the earthquake struck. >>>>> >>>>> Lawrence >>>>> >>>>> >>>>> >>>>> -- >>>>> Lawrenceyates.co.uk <http://lawrenceyates.co.uk/> >>>>> _______________________________________________ >>>>> post: [email protected] >>>>> unsubscribe or set options at >>>>> >>> > https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/bgross%40airmail.ne t >>>>> >>>> _______________________________________________ >>>> post: [email protected] >>>> unsubscribe or set options at >>> https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/hpizka%40me.com >>> >>> >> >> -- >> Jeffrey S. Barker >> Assoc. Prof. of Geophysics, Binghamton University >> Faculty Master, Dickinson Community >> (607) 777-2522 (Geology) (607) 777-2826 (Dickinson) >> http://bingweb.binghamton.edu/~jbarker/ >> _______________________________________________ >> post: [email protected] >> unsubscribe or set options at > https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/bgross%40airmail.ne t > _______________________________________________ > post: [email protected] > unsubscribe or set options at > https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/valkhorn%40aol.com > > _______________________________________________ > post: [email protected] > unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/bgross%40airmail.ne t _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/valkhorn%40aol.com _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/bgross%40airmail.ne t _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/archive%40jab.org
