Comments for paleoseismicity.org http://www.paleoseismicity.org The online community for paleoseismicity, neotectonics, earthquake geology and archeoseismology Mon, 13 Feb 2012 11:40:54 +0000 hourly 1 http://wordpress.org/?v=3.2.1 Comment on Airborne LiDAR shows how the M 7.2 2010 El Mayor-Cucapah earthquake in Mexico changed the landscape by Christoph http://www.paleoseismicity.org/blog/2012/02/12/airborne-lidar-shows-how-the-m-7-2-2010-el-mayor%e2%80%93cucapah-earthquake-in-mexico-changed-the-landscape/#comment-2052 Christoph Mon, 13 Feb 2012 11:40:54 +0000 http://www.paleoseismicity.org/?p=2586#comment-2052 This also explains nicely why paleoseismic trenching can be a very hard business. Just think you do not trench the main fault with the greatest offset but a minor one. You'll probably assume a minor event only. Even if you trench the one with the largest offset, you'll miss some total displacement, too. Thus, your results will underestimate the event and you might not even notice an active fault close to the major one. This also explains nicely why paleoseismic trenching can be a very hard business. Just think you do not trench the main fault with the greatest offset but a minor one. You’ll probably assume a minor event only. Even if you trench the one with the largest offset, you’ll miss some total displacement, too. Thus, your results will underestimate the event and you might not even notice an active fault close to the major one.

]]> Comment on 1223 by Ozgur http://www.paleoseismicity.org/1223-2/#comment-2050 Ozgur Fri, 03 Feb 2012 17:12:37 +0000 http://www.paleoseismicity.org/#comment-2050 Dear author/editor of this webpage, Please correct my address and institution as follows Kozaci, Özgür - California, USA ORGANISATION: Fugro Consultants Inc. ADDRESS: 1777 Botelho Drive, Suite 262, Walnut Creek, 94596 California, USA Dear author/editor of this webpage,

Please correct my address and institution as follows

Kozaci, Özgür – California, USA

ORGANISATION: Fugro Consultants Inc.

ADDRESS: 1777 Botelho Drive, Suite 262, Walnut Creek, 94596 California, USA

]]> Comment on Where on GoogleEarth? WoGE #327 by Simon Wellings (Metageologist) http://www.paleoseismicity.org/blog/2012/01/10/where-on-googleearth-woge-327/#comment-2048 Simon Wellings (Metageologist) Fri, 20 Jan 2012 19:01:07 +0000 http://www.paleoseismicity.org/?p=2419#comment-2048 WoGE #328 can be found here: http://all-geo.org/metageologist/2012/01/where-on-google-earth-328/ WoGE #328 can be found here:
http://all-geo.org/metageologist/2012/01/where-on-google-earth-328/

]]> Comment on Where on GoogleEarth? WoGE #327 by Christoph http://www.paleoseismicity.org/blog/2012/01/10/where-on-googleearth-woge-327/#comment-2047 Christoph Fri, 20 Jan 2012 13:45:38 +0000 http://www.paleoseismicity.org/?p=2419#comment-2047 Yeah, right! It seems like the hint was too easy... The area is called the "verdronken land" (drowned land) in the Westerschelde. Land reclamation took place here from the 13th century for agricultural purposes, but then the mud dikes were abandoned during the years and we have the salt marshes today. Nice wilderness surrounded by extreme human impact. Simon, what do you have for the next WoGE? Yeah, right! It seems like the hint was too easy…
The area is called the “verdronken land” (drowned land) in the Westerschelde. Land reclamation took place here from the 13th century for agricultural purposes, but then the mud dikes were abandoned during the years and we have the salt marshes today. Nice wilderness surrounded by extreme human impact.
Simon, what do you have for the next WoGE?

]]> Comment on Where on GoogleEarth? WoGE #327 by Heijn van Gent http://www.paleoseismicity.org/blog/2012/01/10/where-on-googleearth-woge-327/#comment-2046 Heijn van Gent Fri, 20 Jan 2012 13:19:38 +0000 http://www.paleoseismicity.org/?p=2419#comment-2046 Well, Christoph, this is an interesting area you have picked. And nice to see that there is finally a WoGE I recognized quickly. But as your former collgue, and knowing how you tick, I didn’t want to participate. But now it is solved, I can spill my beans. The green area with the channels area is called the “Verdronken Land van Saefthinge” (Drowned land of Saefthinge) At the moment it is a nature reserve, and one of the largest brakish-water zones of West Europe, but it used to be a prosperous polder area, so prosperous it became it’s own "Heerlijkheid" (a Herrschaft or fee, under control of a Lord), containing the city of Saefthinge. During the All Saints Flood of 1 November 1570 and in the four years that followed, most of the polder drowned, but the city of Saefthinge was spared. Legend has it that the All Saint’s flood was actually caused by the rather arrogant citizens of Seafthinge reluctant to release a captured mermaid. Her merman flooded the area and three surrounding settlements (but not Seafthinge surprisingly…), killing all inhabitants. Still now (on moonlid nights, when all is quiet etc etc) a church bell can be heard calling for help for the drowning city. Later in the Eighty Year War (1584), Dutch Soldiers had to puncture the dike around the city, in defense against the Spanish army. Still now, occasional archeological finds are made in the area, but due to the active tides in the Westerschelde estruary, the area is quite inaccessible and dangerous. During a number of field trips organized by the University of Utrecht, I was able to visit the area with a guide. The tidal channels, which are clearly visible in google earth, are actually cut quite deep into the surrounding land (2-3 m) and are filled with deep and viscous mud. Combined with the inherent flat nature of the rest of the Dutch landscape made it a difficult place to navigate. During the Second World War resistance fighters used it as a hide out. The mortar rounds the occupying forces shot into the area, did not hit anybody, but they did form large circular impressions in the mud. These accumulated fresh rain water. Since the rest of the area is brackish, different plants now grow in these depressions, which is why you see them clearly in air photos (there is actually one visible in first image, above the 'e’s of Google Earth, on the right side of the image). At present the Doel Nuclear Power Station in Belgium can be seen on the horizon once you are out of the tidal channels, making navigation considerably easier. (Information summarized from memory and the Dutch Wikipedia: http://nl.wikipedia.org/wiki/Verdronken_Land_van_Saeftinghe, a little bit of information is found onthe English version here: http://en.wikipedia.org/wiki/Saeftinghe) Well, Christoph, this is an interesting area you have picked. And nice to see that there is finally a WoGE I recognized quickly. But as your former collgue, and knowing how you tick, I didn’t want to participate. But now it is solved, I can spill my beans.
The green area with the channels area is called the “Verdronken Land van Saefthinge” (Drowned land of Saefthinge) At the moment it is a nature reserve, and one of the largest brakish-water zones of West Europe, but it used to be a prosperous polder area, so prosperous it became it’s own “Heerlijkheid” (a Herrschaft or fee, under control of a Lord), containing the city of Saefthinge. During the All Saints Flood of 1 November 1570 and in the four years that followed, most of the polder drowned, but the city of Saefthinge was spared.
Legend has it that the All Saint’s flood was actually caused by the rather arrogant citizens of Seafthinge reluctant to release a captured mermaid. Her merman flooded the area and three surrounding settlements (but not Seafthinge surprisingly…), killing all inhabitants. Still now (on moonlid nights, when all is quiet etc etc) a church bell can be heard calling for help for the drowning city.
Later in the Eighty Year War (1584), Dutch Soldiers had to puncture the dike around the city, in defense against the Spanish army. Still now, occasional archeological finds are made in the area, but due to the active tides in the Westerschelde estruary, the area is quite inaccessible and dangerous. During a number of field trips organized by the University of Utrecht, I was able to visit the area with a guide. The tidal channels, which are clearly visible in google earth, are actually cut quite deep into the surrounding land (2-3 m) and are filled with deep and viscous mud. Combined with the inherent flat nature of the rest of the Dutch landscape made it a difficult place to navigate.
During the Second World War resistance fighters used it as a hide out. The mortar rounds the occupying forces shot into the area, did not hit anybody, but they did form large circular impressions in the mud. These accumulated fresh rain water. Since the rest of the area is brackish, different plants now grow in these depressions, which is why you see them clearly in air photos (there is actually one visible in first image, above the ‘e’s of Google Earth, on the right side of the image). At present the Doel Nuclear Power Station in Belgium can be seen on the horizon once you are out of the tidal channels, making navigation considerably easier.
(Information summarized from memory and the Dutch Wikipedia: http://nl.wikipedia.org/wiki/Verdronken_Land_van_Saeftinghe, a little bit of information is found onthe English version here: http://en.wikipedia.org/wiki/Saeftinghe)

]]> Comment on Where on GoogleEarth? WoGE #327 by Simon Wellings (Metageologist) http://www.paleoseismicity.org/blog/2012/01/10/where-on-googleearth-woge-327/#comment-2045 Simon Wellings (Metageologist) Fri, 20 Jan 2012 13:01:25 +0000 http://www.paleoseismicity.org/?p=2419#comment-2045 This is 51°22'4.39"N 4°11'0.41"E in Holland, just north of the great Belgian port of Antwerp. The river is the Scheldt which is a major trade route in Europe (and has been for hundreds of years, Antwerp is a lovely historic city). I like the way the image has little impact of human activity on it but is really not far from the city itself. Geologically, we are in the tidal zone of a major river. We can see the lovely fractal patterns in the river, passing up into creeks on the vegetated sand bank itself. I suspect there is no bedrock as such in the image and that we are looking at older river sediments (temporarily?) stabilised by vegetation and being, for the moment, away from the major river channel. This is 51°22’4.39″N 4°11’0.41″E in Holland, just north of the great Belgian port of Antwerp.

The river is the Scheldt which is a major trade route in Europe (and has been for hundreds of years, Antwerp is a lovely historic city). I like the way the image has little impact of human activity on it but is really not far from the city itself.

Geologically, we are in the tidal zone of a major river. We can see the lovely fractal patterns in the river, passing up into creeks on the vegetated sand bank itself.
I suspect there is no bedrock as such in the image and that we are looking at older river sediments (temporarily?) stabilised by vegetation and being, for the moment, away from the major river channel.

]]> Comment on On the rocks – how to cool Whiskey adequately by Christoph http://www.paleoseismicity.org/blog/2011/12/28/on-the-rocks-how-to-cool-whiskey-adequately/#comment-2043 Christoph Thu, 05 Jan 2012 01:56:49 +0000 http://www.paleoseismicity.org/?p=2332#comment-2043 Maybe we should not cool Whiskey at all. Maybe we should not cool Whiskey at all.

]]> Comment on On the rocks – how to cool Whiskey adequately by Felix Bossert http://www.paleoseismicity.org/blog/2011/12/28/on-the-rocks-how-to-cool-whiskey-adequately/#comment-2042 Felix Bossert Tue, 03 Jan 2012 22:49:57 +0000 http://www.paleoseismicity.org/?p=2332#comment-2042 Wonderful topic, with great calculations!! Too much water in the whisky is a real problem. As I never was a hero in thermodynamics it took me a while to find out that an "ice-cube" out of copper is not the solution, as the specific heat capacity of copper is only 0.385 J/(gK), so even worse as your 'Nordic Rocks'. Better is (if the value is correct) : chocolate with a value of 3.14 J/(gK). "Ice-cubes" out of chocolate would have three times more cooling capacity, than 'Nordic Rocks'. But the taste would be kind of unusual. The ultimate solution are 'ice cubes' out of stainless steel, meaning water in a steel cube. So we would have the high specific heat capacity of ice including the melting enthalpie etc. The perfect stainless steel ice cube would have a very thin wall and only that much water in it, that the increase of volume of the ice would not crack the cube. I thought I could make a fortune with this idea, but like always someone was faster: http://www.sparpiraten24.de/Haushaltsartikel/Edelstahl-Eiswuerfel-6er-Pack.html Wonderful topic, with great calculations!! Too much water in the whisky is a real problem. As I never was a hero in thermodynamics it took me a while to find out that an “ice-cube” out of copper is not the solution, as the specific heat capacity of copper is only 0.385 J/(gK), so even worse as your ‘Nordic Rocks’. Better is (if the value is correct) : chocolate with a value of 3.14 J/(gK). “Ice-cubes” out of chocolate would have three times more cooling capacity, than ‘Nordic Rocks’. But the taste would be kind of unusual.

The ultimate solution are ‘ice cubes’ out of stainless steel, meaning water in a steel cube. So we would have the high specific heat capacity of ice including the melting enthalpie etc. The perfect stainless steel ice cube would have a very thin wall and only that much water in it, that the increase of volume of the ice would not crack the cube. I thought I could make a fortune with this idea, but like always someone was faster: http://www.sparpiraten24.de/Haushaltsartikel/Edelstahl-Eiswuerfel-6er-Pack.html

]]> Comment on Merry Christmas and a Happy and Healthy 2012 by ReaderOne http://www.paleoseismicity.org/blog/2011/12/21/merry-christmas-and-a-happy-and-healthy-2012/#comment-2017 ReaderOne Mon, 02 Jan 2012 20:09:00 +0000 http://www.paleoseismicity.org/?p=2277#comment-2017 The RSS feed is broken. Please fix http://validator.w3.org/feed/check.cgi?url=http%3A//www.paleoseismicity.org/feed/ The RSS feed is broken. Please fix

http://validator.w3.org/feed/check.cgi?url=http%3A//www.paleoseismicity.org/feed/

]]> Comment on On the rocks – how to cool Whiskey adequately by riccardo http://www.paleoseismicity.org/blog/2011/12/28/on-the-rocks-how-to-cool-whiskey-adequately/#comment-1980 riccardo Sun, 01 Jan 2012 22:21:28 +0000 http://www.paleoseismicity.org/?p=2332#comment-1980 Thought you were in Ireland... nevertheless: great gift fo a whisky-fan! Thought you were in Ireland…
nevertheless: great gift fo a whisky-fan!

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