Watching aftershocks in Italy; hourly updates

In addition to the normal earthquake monitoring (on this page, after the tropical cyclones), I’ve added a special Google Map file (kmz) that updates hourly showing the locations of significant aftershocks.

One note about magnitudes: they change a lot the first few hours or even days after an event as more data comes in.  The magnitudes on the Midgard outputs are calculated from the seismic energy and are rounded so sometimes they are slightly different from the USGS magnitude numbers (I think they are showing 6.0 as the moment magnitude right now), and depending on when a particular site updates you may see slightly different numbers, but we are using the same data.

 

Italy: new aftershocks

Within the last hour there was another significant aftershock (M5.1).  These are never helpful – rescue operations have to stop, and already weakened buildings from the main shock can collapse or suffer additional damage.   This one may have added tens of millions of dollars in additional costs – a BBC reporter just said he heard the sounds of falling masonry during this aftershock and that the clock tower in the cover image of this article collapsed.  Hopefully there were no more casualties.  Here is a map of the main quake and the two biggest aftershocks (a 5.1 an hour after the main shock, and another 5.1 at 1318 GMT (0918 EST).

 

M6.0 EQ in Italy, Forecast $16 Billion damage

Significant earthquake this morning north of Bologna, Italy early this morning their time (10pm EST, 0203 GMT).  Only 6 reported killed so far, and 50 injuries, but major damage is being reported across the region and I expect those numbers to go higher.  Given the age and construction of the buildings in this region, this is not surprising.  Comparisons are already being made with 2009′s L’Aquila quake, a 6.3 quake which caused 300  deaths and over 20 Billion in damage.  While natural disasters are never good news, the present economic state of Italy and the EU in general makes this even worse news.  There are some economists who argue for a “disaster stimulus”.  My research indicates they are wrong (“Idiots” is the word I may have used).   Disasters redirect economic activity from discretionary activities to repairs and recovery.  While some sectors certainly do benefit, (rumor has it certain crime organizations in Italy made huge $ after L’Aquila), in general they are a bad thing.

The following table shows the estimated damage for various regions of Italy using 15 different computer models.  The models range from 900 Million to 30 Billion, with most clustering around 16-19 Billion US Dollars.  These are total economic impact, and include physical damage, lost revenues, cleanup, etc. My estimate is $16 Billion or so.

admin_name county_name min median average max weighted_loss
EMILIA-ROMAGNA ITALY 8.30744e+08 1.7662e+10 1.53939e+10 2.75783e+10 1.6125e+10
LOMBARDIA ITALY 4.56278e+07 8.91457e+08 7.71604e+08 1.43863e+09 8.12564e+08
TOSCANA ITALY 4.08711e+06 4.08711e+06 4.79858e+06 5.51006e+06 621045
VENETO ITALY 2.29745e+07 7.45062e+08 7.225e+08 1.93025e+09 7.54929e+08

 

country_name min avg median max weighted_loss
ITALY 8.99519e+08 16888677627.7333 1.94833e+10 3.09139e+10 1.76931e+10

 

 

Huraggeden 2012 begins! Alberto Forms off SC Coast

The temptation was too great: NHC declared the low mentioned earlier today to be the first tropical storms of the season, AL012012, aka Alberto.  Their forecast track, as well as our in-house WRF and MM5 runs, keep the storm close to or brushing the SC/NC coast, but only as a minimal tropical storm. NHC keeps it a TS the entire forecast, but  the HWRF model drops it below TS strength Here’s the NCEP HWRF track and our wind swath:

This storm really shouldn’t cause much concern.  Many winter storms (Nor’easters) that have  greater damage potential aren’t tracked this closely or publicized as heavily, probably because they don’t have a dedicated center to monitor them.

 

Invest area off the SC Coast

The low that was sitting off the SC coast for the last week is finally moving (giving us in Savannah a beautiful morning), and is a bit better organized.  It’s not really a tropical cyclone yet, but the NWS has started modeling and tracking it as one as these distinctions are not sharp lines.  Now that the model tracks are publicly available, people often get excited about invest areas, but most don’t spin up in to full fledged storms, and you have to be skeptical, especially the intensity forecasts, as those models make certain assumptions that may not apply to immature systems.  This is particularly true early and late in the season.   If you watch our site you’ll often see the thin yellow lines denoting “areas of interest”, aka invest areas.  There are five of them this morning.

 

Seasonal Hurricane Activity Forecasts

It’s that time of year, when those of us doing hurricane research take the auspices for the upcoming Hurricane Season.  Instead of watching the flight of birds, we watch the flicker of numbers in computer models.  Most forecasts attempt to divine the number of tropical storms and hurricanes that will form.  Historically most of these forecasts haven’t been all that great, and I question how useful guessing the number of storms would be even if they were accurate.  In an average year there are 10-11 storms.  But who cares if there are 25 storms if they are all “fish storms” and stay out at sea?  Or a year like 1992 where there were only 7 storms, but one of them was Andrew and caused over $45 Billion in damage (2010 dollars).  Emergency managers love it when researchers say “it’s going to be a busy year”, and hate it when we say “it’s going to be a quiet year”, because from an emergency planning perspective, you should always assume you’re going to get hit.

But for economic planning, it is useful to know the odds of seeing damage. That’s why Mark Johnson (Professor of Statistics at the University of Central Florida) and I take a somewhat different approach: the Selfish Forecast.  We don’t care how many storms there are, but calculate the probability one might hit one of us (Orlando or Savannah) and cause damage.  Put a different way for doing an overall season forecast, what is the probability of losses in dollars from hurricanes in a given year?  Over the next few days I’ll post a bit more about how we do these forecasts, and what things look like for 2012.

 

Avengers Movie Damage to NYC

OK, this was a weird one. We were contacted by The Hollywood Reporter, one of the big Hollywood news publications. They wanted us to do an estimate of the amount of damage the final act of the new Avengers movie would cause to New York City if it really happened.

Here’s their story, the story behind the story, and our actual report.

This story got a *huge* amount of coverage – was reported on CNN, Fox, not to mention lots of blogs (even political types like Rachel Maddow).  Strange world – publish dozens of peer review papers/articles/books and save 1000′s of lives while toiling in anonymity, but do one report on a movie as a joke and suddenly you’re a hero . . .