January 10th, 2005
Asian disaster a “wake-up call” for Mexico
Across another ocean thousands of kilometres to the east and 11 hours after the first giant wave overwhelmed Aceh on 26 December, the tsunami registered on the Pacific beaches of Mexico. With an amplitude of a few centimetres to one metre at Manzanillo, it was small, but measurable none the less.
In the terrible aftermath of the Asian quake and lethal tsunami, other earthquake-prone countries are urgently looking at their own civil protection procedures. Experts in Mexico have cautioned that the current systems to detect an approaching tsunami minutes or hours before it hits the shore are inadequate.
In recent days, Mexican news sources have quoted Osvaldo Sánchez, of the Oceanographic Service and Cuauhtémoc Nava, from the Centre for Scientific Research and Higher Education in Ensenada (CICESE), and backed their calls for Mexico to upgrade the infrastructure to warn the local population of any possible tsunami danger along the unprotected central Pacific coastline. Researchers have emphasised the urgency of installing monitor buoys at 100km intervals along the length of the Mexican Pacific.
The region is not without major tsunami events. Over the past three centuries at least 18 destructive tsunami have struck the shores of present-day Colima, Jalisco, Michoacán and Guerrero states.
On 3 June 1932, a huge earthquake occurred off the coast of Colima and Jalisco, killing 400 people in the immediate area. Three weeks later, on 22 June, a strong aftershock generated a deadly 10 metre-high wall of water that swept away the fishing community of Cuyutlán, killing 75 and injuring another 100. Not a single building was said to be left standing along a stretch of coast 20km long by 1km wide.
The most recent hit on 9 October 1995. After a strong tremor measuring 7.9 on the Richter scale, waves up to 5m high pummelled Barra Navidad and Melaque, 200km (120 miles) south of Puerto Vallarta in Jalisco.
For those who return to a favourite Pacific beach after an absence of perhaps a year or two, the change in beach topography can be marked. The ravages of a hurricane or damaging waves associated with tropical storms continuously alter the shape and profile of the coast. Significant sections of beach can be lost making you believe you’ve mistaken ‘your’ beach for another. From my own experience, many of those living on the coast are tuned into the tell tale signs of ‘suck-back’ and the fickleness of the ocean currents. Day-trippers and those new to an area are often blissfully unaware of anything that may get in the way of their holiday.
As many as 85 per cent of quakes in Mexico have their epicentre less than 80km offshore, giving only a matter of minutes’ warning before tsunamis hit land. Up against a super-tsunami, those odds would make even Japan’s cutting-edge system effectively useless, without further advances.
Nevertheless, Mexican authorities have historically been slow to respond to natural disasters, so it will be interesting to see whether there is any fresh acknowledgment or re-assessment of Mexican vulnerability (however small) and a new awareness of the need for an adequate tsunami early-warning system. While earthquake drills are well-practiced, a programme for educating those who live in low-lying coastal areas of the latent risk on their doorstep may one day save scores of lives in the event of similar destructive waves hitting the Pacific coast of Mexico.
Those with vested interests in doing nothing need to heed the lessons of the Indian Ocean disaster and not sweep the issue under the carpet – perhaps for fear of unsettling tourism – rather like the issue of beach cleanliness I have raised in the past.
In November 2004, Mexican oceanographers from CICESE installed the first ‘real time’ observation post in Baja California to detect tsunami. Politicians now need to show foresight and release the resources to extend this facility down the Pacific litoral, as well as setting up the communications infrastructure to issue timely warnings to the general populace living near the ocean. The Asian quake not only set off a series of devastating waves, it set off a number of alarm bells elsewhere.
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Over the past 25 years, Ian and Graciela have used music, dance, drama, costumes, artefacts, crafts, slides and more than a dose of infectious enthusiasm, to bring Mexican history and culture alive to over 100,000 wide-eyed and curious school children the length and breadth of England. An incredible achievement.
The move is the result of a collaboration between the charity and coffee cooperatives in Ethiopia,