XCode 3.2.3 GCC problem

GCC : 4.2.1 i686-apple-darwin10 (Apple Inc. build 5664)

It is there is link error in GBASE

So I used llvm-gcc

Enable Qt-Terminal in Gnuplot

It is little bit tricky to compile gnuplot with qt terminal.

1st .
./configure --enable-qt

2nd
edit two source files

in line 1126-1128 of term/cairo.trm file.
// cairo_params->width = cairo_params_default->width;
// cairo_params->height = cairo_params_default->height;
// cairo_params->base_linewidth = cairo_params_default->base_linewidth;

this caused compile error for gcc
it is set strict ANSI-C syntax, so it does not accept C++ comment style.
Change it in C standard comments
/* cairo_params->width = cairo_params_default->width; */
/* cairo_params->height = cairo_params_default->height; */
/* cairo_params->base_linewidth = cairo_params_default->base_linewidth; */

in line 2061 of src/wxterminal/gp_cairo.c
// EAM DEBUG

caused error also.

My OS is OpenSUSE 11.2.

Update

Compile GNUPLOT with AQUATERM (only 32bit)in Snow Leopard

export LDFLAGS=-m32

export CFLAGS=-m32

./configure -with-readline=bsd --without-x

Elastic Rebound Theory

The elastic rebound theory is an explanation for how energy is spread during earthquakes. As plates on opposite sides of a fault are subjected to force and shift, they accumulate energy and slowly deform until their internal strength is exceeded. At that time, a sudden movement occurs along the fault, releasing the accumulated energy, and the rocks snap back to their original undeformed shape.

In geology, the elastic rebound theory was the first theory to satisfactorily explain earthquakes. Previously it was thought that ruptures of the surface were the result of strong ground shaking rather than the converse suggested by this theory.

Ancient cultural explanations of earthquakes were often along the lines of the mythical Japanese Namazu: A giant catfish with the islands of Japan on his back. A demigod, or daimyojin, holds a heavy stone over his head to keep him from moving. Once in a while the daimyojin is distracted so Namazu moves and the Earth trembles.

ollowing the great 1906 San Francisco earthquake, Harry Fielding Reid examined the displacement of the ground surface around the San Andreas Fault^[1]. From his observations he concluded that the earthquake must have been the result of the elastic rebound of previously stored elastic strain energy in the rocks on either side of the fault. In an interseismic period the Earth's plates (see plate tectonics) move relative to each other except at most plate boundaries where they are locked. Thus if a road is built across the fault as in the figure panel Time 1 it is perpendicular to the fault trace at the point E where the fault is locked. The far field plate motions (large arrows) cause the rocks in the region of the locked fault to accrue elastic deformation, figure panel Time 2. the deformation builds at the rate of a few centimeters per year, over a time period of many years. When the accumulated strain is great enough to overcome the strength of the rocks an earthquake occurs. During the earthquake the portions of the rock around the fault that were locked and had not moved 'spring' back, relieving the displacement in a few seconds that the plates moved over the entire interseismic period (D1 and D2 in Time 3). The time period between Time 1 and Time 2 could be months to hundreds of years, while the change from Time 2 to Time 3 is seconds. Like an elastic band the more the rocks are strained the more elastic energy is stored and the greater potential for the event. The stored energy is released during the rupture partly as heat, partly in damaging the rock and partly as elastic waves. Modern measurements using GPS largely support Reid’s theory as the basis of seismic movement, though actual events are often more complicated.

Reid, H.F., The Mechanics of the Earthquake, The California Earthquake of April 18, 1906, Report of the State Investigation Commission, Vol.2, Carnegie Institution of Washington, Washington, D.C. 1910
http://earthquake.usgs.gov/regional/nca/1906/18april/reid.php

Seismicity of Haicheng Earthquake

Haicheng Earthquake Feb. 4, 1975 was successfully forecasted.

It is very important to understand the seismicity there.

Mean Group Velocity

Mean Group Velocity around Korean Peninsula from 2009 Test