Some notes for the research are collected/written here:
- A useful SAC commend: cuterr fillz (used to fill up zeros if there is no data point to cut in demanded time period)
- IRIS web notes about common rotations in seismology
- The SAC command interpolate for down-sampling is clearly aliasing once the sampling rate is less than 100 Hz, so the command decimate is always preferred.
- The unit of the seismograms extracted from seed file is usually in meter, and that downloaded from STP with gain on is in centimeter (count is provided with gain off).
- The unit of displacement data downloaded from BATS is meter, which is the same with that of SEM synthetics but different from that of FK synthetics. The unit of FK synthetics is centimeter.
- Since FK uses impulse function instead of step function as moment function, the output of FK is actually velocity seismograms/Green's functions, not displacement.
- Useful noise comparison plots
- The flat-response frequency band of Palert MEMS sensor ranges 0.05-15 Hz (ca. 0.1-10 conservatively).
- Lagrage multiplier (拉格朗乘數)
- Integration by parts (分部積分)
- Mean and Variance of Sample Mean
- The basics of Fourier transform
- Frequency domain representation of the time delay
- Geographic Distance and Azimuth Calculations 
- A cool illustration of numerical optimization
- 英文論文寫作時態 
- To + V or To + Ving
- While & When
- For the reason - as/because; For this reason - therefore, thus
- "Due to" is used as an adjective, and "because of" is used as an adverb.
- Comparable commands between Windows and Linux
- Unix 重新導向跟 2>&1
- Difference between calling by value, by address, and by reference in C/C++
- The Hitchhiker's guide to Python
- Some useful Fortran tricks
- Install Torque on Centos 6
- Install CentOS Extras repository
- The wave-guided effect of subducted plate (with high-frequency content and sustained coda) observed in Taiwan region mainly takes place in a frequency band >3 Hz. (Chen et al., 2013)
- The evocative "super-eruption" is an informal term referring to volcanic events in which at least 300 km^3 of magma are explosively evacuated from a subsurface magma chamber (Sparks et al. 2005). Any volcanic system that has produced a super-eruption is consequently dubbed a "super-volcano".
- Temperature of magmas (in Celsius): Basaltic magma - 1000-1200, Andesitic magma - 800-1000, rhyolitic magma - 650-800.
- Terminology aliases between solid Earth (left) and exploration (right) seismology:
source time function | source wavelet
epicentral distance | offset
seismogram | trace
station | receiver
seismic event | source
phase | event
- Slowness u(s/deg) ~ u(s/km) * 111.91
- Rule of Thumb: building natural frequency (s) ~ 1/10 *number of storey
- Migration in practice