It is possible to forecast earthquakes
I must at the outset admit that I
am only a writer, I am no geologist but I have a very deep interest in
seismology and earthquakes. I have studied earthquakes and to some extent
cyclones with obsessive fascination. I wish to share my observations and hope
that geologists and seismologists will be able to work on what I suppose to be
a vague theory.
Big magnitude earthquakes occur
either in the early hours of or atleast before noon on the 26th of
the month or atleast around the 26th of the month. 11th
and 26th of the months seem to be favourites for release of seismic
energy / rupture on fault lines). A startling realisation that the Bam
earthquake (26.12.2003, Iran), Bhuj earthquake (26.01.2001, Bhuj, Gujarat) and
the Andaman Sumatra Earthquake (26.12.2004, Sumatra) occurred in the wee hours
or atleast before noon led me to the historical database of earthquakes on USGS;
It became apparent that the Bio-Bio earthquake occurred on 27th of
February 2010, the Good Friday Great Alaska Sound Earthquake happened on 28th
March 1964, and so on…
The 60 years geological cycle
also needs to be studied with seriousness after the Asian Tsunami of December
2004. 62 years before that a similar destructive tsunami following a mega
earthquake had smashed Indonesia and Andaman Nicobar Islands… in 1942. And
approximately 60 years before that another great seismic event occurred… the
cataclysmic eruption of the Krakatau volcano in Indonesia led to violent tsunamis
in the Indian and Pacific Oceans and resulted in short term climate change.
Similarly the Chile earthquake of 27th February 2010 – that is - the Bio-Bio
earthquake - occurred almost 60 years after the devastating M 9.5 earthquake of
May 22nd 1960. So will the Alaskan Mega Earthquake of March 27 1964 with a
magnitude of 9.2 repeat its scale of destruction in 2024? It doesn’t hurt to be
prepared right?
Similarly the 11th of
any month is also a favourite for release of seismic energy. M 7, M 6
earthquakes have occurred on or around the 26th of the month. The following
data has been sourced from USGS’s historical earthquake database.
·
26 December 1939 Turkey (M.7.8),
·
26th November 1942 Turkey (M 7.1)
·
26.May 1957 Turkey (M 7.1)
·
26th April 1959 (Taiwan region (M 7.5)
·
26th January 2001 Bhuj Earthquake (M 7.6)
·
26th May 2003 - Seven Trees, California - M 3.8,
·
26th May 2003 Halmahera Indonesia ( M 7.0),
·
26th May 2003 Muir Beach California (M.3.8),
·
26th December 2003 Bam Earthquake (M 6.6),
·
26th December 2004 Sumatran Mega Earthquake (M
9.1),
·
26 February 2005 Simeulue Indonesia (M 6.8),
·
26. September 2005 Peru (M 7.5)
·
26th May 2006 Java Indonesia (M 6.3)
·
26th December 2006 - Taiwan region - M 6.9,
·
26th December 2006 - Taiwan region - M 7.1,
·
26th July 2007 Molucca Sea (M 6.9)
·
26th September 2007 Papua New Guinea, (M 6.8)
·
26th December 2007 Alaskan Earthquake, (M6.4)
·
26th April 2008 Nevada USA (M 5.0)
·
27th February 2010 Bio-Bio Chile (M 8.8)
I have calibrated the following
data from Google Earth / Digital Globe
·
28.09.1998 Java Indonesia (M 6.6)
·
12th September 2007 Southern Sumatra
( M 8.5)
·
13th February 2001 Southern Sumatra (
M 7.4)
·
14th August 1999 Southern Sumatra (M 6.4)
·
12th December 1992, Flores, Indonesia
(M 7.5)
·
26th January 2006 Banda Sea (M 7.6)
It does not mean earthquakes do
not strike on other days. Neither does it mean that smaller magnitude
earthquakes do not occur on 11th or 26th of the months or
around these days. They do. But the likelihood of big earthquakes striking on
or around the 11th and 26th of the months is higher…
going by the database of earthquakes.
In today’s advanced technological
era it should be possible for seismologists and geologists to measure the build-up
of seismic pressure in fault zones regularly. Monitoring the build-up of
seismic pressure should be – logically speaking – able to pint the likely
rupture points or the epicentre, and the likely date of rupture. Given that the
dates are presupposed to be either 11th or 26th of a
month if vigorous monitoring is undertaken it should be possible to calibrate a
potential rupture zone and an educated guestimate of the magnitude of an
earthquake.
Of course there are other
pointers too. Volcanic eruptions are
preceded by a series of seismic tremors as we learnt in Iceland last year
before the Bardarbunga volcano exploded in August 2014. Other observers like
Dr. Arunachalam Kumar theorise that mass strandings of cetaceans on continental
shelves are a sure and ominous sign of an imminent earth
Source: GVP / Digital Globe / Smithsonian Institutions
quake. There are documentation available that animal
behaviour can be an early warning – a theory that has very recently gained
scientists’ acquiescence. Oceanographers are researching about the change in
ions above the oceans before a tsunamigenic earthquake is likely to strike.
Oceanographers in India’s INCOIS
have succeeded in calibrating the estimated wave heights, time of arrival and
path of a tsunami for earthquakes around the Indian coasts. They have done this
by calibrating the latitude-longitude against the bathymetric profile of the
seas around India. With such advances made all that is needed is political will
to back the scientists. By utilising scientific applications, human development
can be assured for it mitigates disaster risk… the kind less resilient
communities like in Nepal or coastal fishers are ideal candidates for …
Critique, feedback and
discussions welcome.
Thank you.
Malini Shankar