5,7 ήταν με επίκεντρο τη θαλάσσια περιοχή της Κρήτης...

Εντονος πολυ, ασε που κρατησε καπου 20 δευτερολπετα ισως και παραπανω, ενιωσα το σπιτι να τριζει...................................

Ο χρήστης Megane98hp έγραψε:
Εντονος πολυ, ασε που κρατησε καπου 20 δευτερολπετα ισως και παραπανω, ενιωσα το σπιτι να τριζει...................................

32 δευτερόλεπτα με το PC κάτω από το τραπέζι ήμουν...

Ο χρήστης chazlp1989 έγραψε:
5,7 ήταν με επίκεντρο τη θαλάσσια περιοχή της Κρήτης...

Πού το ειπαν αυτο;

Ο χρήστης Megane98hp έγραψε:

5,7 ήταν με επίκεντρο τη θαλάσσια περιοχή της Κρήτης...

Πού το ειπαν αυτο;

Δεν το είπαν δημοσιεύτηκε σε μία πολύ έγκυρη πηγή στο net...
Πάντα σωστά τους γράφουν...
Δες: http://geofon.gfz-potsdam.de/db/eqinfo.php

Κι οτι δεν τη παλευα αλλο και ηθελα να παω για υπνο. Αντε τωρα να κλεισεις ματι.

Ο χρήστης Megane98hp έγραψε:
Κι οτι δεν τη παλευα αλλο και ηθελα να παω για υπνο. Αντε τωρα να κλεισεις ματι.

Τώρα δεν κλείνεις μάτι, τώρα φυλάς καραούλι...
Και αν ήταν προσεισμός;

2008-03-28 02:16:19.3 34.79 N 25.41 E 68 mb 5.8 CRETE, GREECE

ψυχραιμία guys

Ο χρήστης x-origin έγραψε:
2008-03-28 02:16:19.3 34.79 N 25.41 E 68 mb 5.8 CRETE, GREECE

ψυχραιμία guys

Α!Ήταν και 5,8 δέσαμε...

κ έλεγα ποιος με κουνάει στον ύπνο

Μάλλον κοιμάμαι πολύ βαριά, δεν κατάλαβα τίποτα!

Αντιγράφω τμήματα δημοσιεύματος από ένα από τους εγκυρότερους γεωπιστημονικούς οργανισμούς (Americal Geophysical Union).

Αφιερωμένο εξαιρετικά σε σεισμολάγνους, σεισμολογούντες, ανευθυνοϋπεύθυνους, Μάκηδες, τηλεσεισμολογους, βαρωτσικούς, αντιβαρωτσικούς, κ.ο.κ.

(οι επισημάνσεις (bold) δικές μου)

Earthquake Early Warning Starts Nationwide in Japan

When an earthquake occurs, a certain amount of time elapses before destructive seismic energy hits nearby population centers. Though this time is measured on the order of seconds, depending on the proximity of the rupture to a given city or town, a new public safety program in Japan is taking advantage of the fact that seismic energy travels slower than electronic communication. In this program, the Japan Meteorological Agency (JMA) rapidly determines the hypocenter (earthquake epicenter and focal depth) and magnitude of the earthquake by using real-time data from stations near the hypocenter. The distribution of strong ground shaking is anticipated quickly, and then the information is delivered immediately to government officials, representatives from various industries, members of the news media, and individuals before strong ground shaking reaches them. For example, on receiving the warning, the control room of a railway company can send an emergency notice to all train drivers to stop their trains immediately, elevators in buildings can be triggered to stop at the nearest floor and open their doors automatically, and surgeons can temporarily suspend their surgical operations to avoid risk to patients on operating tables.** This innovative new service, called Earthquake Early Warning (EEW), started nationwide in Japan and became fully operational in October 2007. This service is definitely different from earthquake prediction**. Although it is currently impossible to be aware of earthquakes before their occurrence (earthquake prediction), EEW operates with the assumption that it is possible to warn people located at a certain distance from the hypocenter before strong ground shaking reaches them.

(...)

Earthquakes occur when stressed rock moves through brittle rupture. Two types of seismic
waves are radiated from the hypocenter: One is the P wave, which travels at about 7 kilometers per second, and the other is the S wave, which travels at about 4 kilometers per second. EEW technology not only takes advantage of the relatively slow velocity of the
seismic waves as compared with instantaneous electronic communication, but it also uses the difference in arrival time between P and S waves. The S wave is slower than the P wave, but the amplitude of the S wave is usually 3–10 times larger than that of the P wave. This generally means that stronger shaking is observed along the S wave.

(...)

If predicted seismic intensities surpass a certain threshold, a warning is disseminated and broadcast. It is important to rapidly determine earthquake parameters so that EEWs can inform users about an earthquake before the arrival of the larger-amplitude S waves.

(...)

EEW users are divided into two categories: online limited users and other general users.
Online limited users are organizations that obtain EEWs by computer communication technology to control automatically something related to their businesses. These users are assumed to understand adequately the characteristics and limitations of EEW technology. Online limited users include railway companies, elevator companies, and manufacturing industries. By contrast, general users comprise most individuals and organizations who receive the warnings and then decide how best to mitigate their risk.

(...)

For general users, EEWs include information on an epicenter location name, such as the name of the prefecture for inland earthquakes or the name of the sea area for offshore earthquakes, the origin time of the event, and the locations of districts with predicted seismic intensity equal to 4 or greater on the JMA scale.
EEWs will be delivered to general users through various methods such as television, radio, e-mail via cellular telephone, and Internet. Using the Internet, a Japanese electronics company even developed a tissue-boxsized EEW device that sounds an alarm, indicates the anticipated intensity, and counts down the seconds to the S wave arrival. The method of issuing warnings to general users is based on a pattern similar to that used for limited users.

(...)
This information dissemination system was tested for 29 months between February 2004 and June 2006. During that time, thresholds of magnitude and seismic intensity were tentatively 3.5 and 3, respectively, for issuing the first warning. In total, EEWs were issued 855 times, including 26 false alarms due to mechanical troubles, lightning strikes, and human error. All of the false alarms occurred when estimations of seismic parameters were made using only a single station.
(...)
EEWs are expected to be effective for online control of traffic and lifeline systems, and for emergency action. In addition to triggering trains to slow down, elevators to stop, or hospitals to suspend surgical operations, other examples of the application of EEW include transferring important data from computers to disks immediately and shutting down electronics automatically. Further, people receiving general EEWs can choose to take emergency precautions (for example, taking shelter under a desk, or keeping away from glass windows) at homes, schools, offices, halls, and shopping malls.
(...)

**Technical Limits of EEWs **

Though EEWs are expected to be a powerful tool for mitigating earthquake disasters, the system has several technical limitations. For inland shallow earthquakes, EEWs are too slow for places near the epicenter, where the S wave arrives less than a few seconds after the occurrence of the earthquake. For earthquakes of more than a magnitude of 7, rupture usually continues for more than 10 seconds, with a first warning possibly being disseminated in the middle of the rupture. In the case of such large earthquakes, the estimation of magnitude and seismic intensity may be underestimated in some cases. Additionally, when more than two earthquakes occur repeatedly at short intervals, it is difficult to separate them automatically.
(...)

Case Study: A 7.2 Earthquake off Miyagi Prefecture: During the testing period, an M = 7.2 earthquake occurred off the coast of Miyagi prefecture, Japan, on 16 August 2005. The first warning was disseminated 4.5 seconds after the first detection of the P wave at the closest seismic station. The dissemination was earlier by 16 seconds than the arrival of the larger-amplitude S wave at the city of Sendai.
(...)
EEW users were aware of the strong shaking in advance of it reaching the city.
For the limited online users, EEW delivery service was started in August 2006; general users were able to receive warnings beginning in October 2007. Because EEW is a new and innovative service, JMA is making an effort to familiarize general users with it to avoid confusion caused by poor understanding.
(...)

ΠΗΓΗ:** EOS Transaction, American Geophysical Union**, 19 Feb. 2007

Αυτο δεν ειπε πριν απο ενα μηνα οτι το ανακαλυψε πρωτος στον κοσμο ο Τσελεντης;

Ο χρήστης greo έγραψε:
Αυτο δεν ειπε πριν απο ενα μηνα οτι το ανακαλυψε πρωτος στον κοσμο ο Τσελεντης;

Θου κύριε......

[λες να φάω μήνυση που δεν τον έβαλα στα credits?.... ]

Ειχε πει ακριβως τα ιδια. Τρενα, γεφυρες κλπ

Αληθεια εκεινος ο σεισμος που θα ισοπεδωνε την Αθηνα, τελη Φεβρουαριου - αρχες Μαρτιου τι εγινε; Μηπως η προβλεψη ηταν με το παλιο ημερολογιο;

Α, δεν τά'μαθες? Ο σεισμός έγινε τις μέρες που'χαν απεργία οι δημοσιοκάφροι, οπότε το θέμα 'θάφτηκε'...

(κάτι σαν τους Γάλλους στην Ολυμπία, σα να λέμε.... )

Ο χρήστης dirtoulios έγραψε:

Αυτο δεν ειπε πριν απο ενα μηνα οτι το ανακαλυψε πρωτος στον κοσμο ο Τσελεντης;

Θου κύριε......

[λες να φάω μήνυση που δεν τον έβαλα στα credits?.... ]

Το είχα διαβάσει αρκετά πριν από ένα μήνα

Θυμάμαι ότι οι ερευνητές ανακάλυψαν ότι από τα πρώτα κύματα του σεισμού μπορούν να υπολογίσουν (περίπου) το μέγεθός του και να χτυπήσουν το συναγερμό ή όχι.

Σεισμος ..

Δεν εχει ερθει απο τα μερη μου οποτε δε εχω καποια εμπειρα στο θεμα

Ο χρήστης egobrain έγραψε:
Σεισμος ..

Δεν εχει ερθει απο τα μερη μου οποτε δε εχω καποια εμπειρα στο θεμα

Τότε, γιατί ποστάρεις?

Ο χρήστης egobrain έγραψε:
Σεισμος ..

Δεν εχει ερθει απο τα μερη μου οποτε δε εχω καποια εμπειρα στο θεμα

Πες που μένεις και θα σου έρθει με courier.