id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
esrj-21098	Londoño B., John Makario	ACTIVITY AND Vp/Vs RATIO OF VOLCANO-TECTONIC SEISMIC SWARM ZONES AT NEVADO DEL RUIZ VOLCANO, COLOMBIA	2010	14	.pdf	application/pdf	6332	341	69	Bohorquez (1993) analyzed arrival times of P and S waves, polarity of the P wave, spectra of frequencies and par- ticle motion of VT earthquake swarms occurred at August - October 1990. It is known that changes in Vp/Vs ratio may be related to changes in the physical and chemical properties of the me- dium, such as partial saturation of rocks, changes in temper- ature, density, and steam content (Birch, 1961;	cache/esrj-21098.pdf	txt/esrj-21098.txt