En Natgeo, el geólogo Samuel Bonis explicó que el hoyo de Ciudad Nueva no es una formación natural, sino que ocurrió porque la piedra poma que hay en el suelo fue erosionada por algún tipo de filtración en los sistemas de desagües.
La erupción del Volcán de Pacaya fue de tipo pliniana, nombre que recuerda a Plinio El Jóven que presenció la erupción del Vesubio en el año 79 A.D. En esa ocasión y por investigar la erupción más de cerca, murió Plinio El Viejo, que era tío de El Jóven. Si quiere saber más sobre la erupción del Volcán de Pacaya, vea la entrevista que le hice al geólogo Sam Bonis.
En su carta a Cornelio Tácito, Plinio El Jóven escribió así de la erupción que acabó con Pompeya y Herculano:
My uncle having left us, I spent much time as was left on my studies…till it was time for my bath. After which I went to supper, and then fell into a short and uneasy sleep. There have been noticed for many days before a trembling of the earth, wich did not alarm us much, as this is quite an ordinary occurrence in Campania; but it was so particularly violent that night that it did not only shook but actually overturned, as it would seem, everything about us. My mother rushed into my chamber, where she found me rising, in order to awaken her. We sat tosn in the open court of the house, which occupied a small space between the buildings and the sea. As I was at that time but eighteen years of age, I know not wheter I should call my behaviour, in this dangerous juncture, courage of folly…we therefore resolved to quit the town. A panic-sticken crowd followed us and (as to a mind own) pressed on ud in dense array to drive us forward as we came out. Being at a convenient distance from the houses, we sood still in the midst of a most dangerous scene. The charriots, which we had ordered to be drawn out, were so agitated backwards and forwards, throguh upon the most level ground, that we could not keep the steady, even by supporting them with large stones. The sea seemed to roll back upon itself, and to be driven from its banks by convulsive motion of the earth; it is certain at least the shore was sonsiderabaly enlarged, and several sea animals were left upon it. On teh other side, a black and dreadful clud broken with rapid zigzag flashes, revealed behind it various shaped masses of flame: this were like sheet-lightning, but much larger….The ashes now bagan to fall upon us, through in no great quantity. I looked back; a dense, dark mist seemed to be following us, spreading itself over the country like a cloud….I remember someone who declared that one part of Misenum had fallen, that other was on fire; it was false, but they found people to believe it….At last this dreadful darkness was disipated by debgreees, like a cloud or smoke; teh real day returned, and even the sune shone oud, through with a lurid light, as when an eclipse is coming on., Every object that represented itself to our eyes (which were extremely weakened) seemed changes, being covered deep with ashes as if with snow…
Pliny. Letters. Letters and Treatises of Cicero and Pliny, en The Harvard Classics, P.F. Collier & Son Corporation, New York, Pp-288-291
En la foto voy rumbo al Pacaya, en febrero de 2006.
Hoy conversé con el geólogo Sam Bonis, acerca del fenómeno del Volcán de Pacaya y sus consecuencias. Haga clic, aquí, y podrá ver la plática. Pocas personas saben tanto de los volcanes guatemaltecos como Sam que, además, quiere mucho a Guatemala; y nos cuenta por qué es que este terruño es uno de los lugares geológicamente más interesantes del globo.
Fue durante Escenas de la juventud, Op. 15, de Robert Schumann e interpretadas por Roberto Prosseda, que escuché que la lluvia estaba particularmente fuerte. Supuse eso porque se oía que la lluvia golpeaba el techo del Auditorium Juan Bautista Gutiérrez, de la Universidad Francisco Marroquín.
Encontré, en mi cámara, esta otra foto del Volcán de Pacaya echando lava hoy en la mañana. Si a usted le interesan los volcanes, le recomiendo las fotos de Volcanes de Guatemala, por mi amigo, Mario; y las conferencias Sismicidad y volcanismo en el Mundo, por Héctor Monzón; y Lanscapes of Guatemala, por Sam Bonis.
Así se veía, hace unos minutos y desde la ciudad de Guatemala, la lava que está saliendo del Volcán de Pacaya. En la emoción se me olvidó poner apropiadamente la cámara; pero ahí se ve, tenue, el punto rojo sobre el cono.
