A TERRA TREME an earthquake risk awareness exercise, will take place at 11.05 hrs on 15th November 2020, throughout the country.
The National Authority for Emergency and Civil Protection (ANEPC) promotes, on the 5th of November, at 11:05 am, the 8th edition of the national seismic risk awareness exercise, called “A TERRA TREME”. The date indicated for its realization coincides with the World Tsunami Risk Awareness Day, an ephemeris instituted by the UN.
This initiative is part of the activities that form part of the National Strategy for Preventive Civil Protection and aims to empower the population to know how to act before, during and after an earthquake, sensitizing citizens to the fact of living in a risk society, and challenging themselves o to get involved in the process of building safer and more resilient communities.
The exercise comprises the practice of 3 simple gestures that can make a difference to those who practice them in the face of an earthquake. The action takes place during one (1) minute, in which the participants, individually or collectively, are invited to perform the 3 self-protection gestures: DROP, COVER, HOLD.
Although the Exercise has national expression, ANEPC will hold, in conjunction with DGE and DGEstE, a main event at Ericeira Basic School, in Mafra, which, given the situation resulting from the COVID´19 pandemic, will take place in a smaller format, serving to mark the date and promote everyone’s awareness of the topic of seismic risk.
It should be noted that the performance of the three gestures that make up this Exercise can be carried out in any context, without calling into question the public health measures associated with COVID´19.
Participation in the Exercise can take multiple forms, namely:
2019 A Terra Treme
A TERRA TREME, an earthquake risk awareness exercise, will take place at 11.15 hrs on 15th November 2019, throughout the country. This coincided with International Tsunami Awareness Day
This is a national exercise which involves the community, for the purpose of creating awareness of the earthquake risk here in Portugal and importantly simple measures people can take, in case an earthquake strikes, which may save lives. In 2018 over 625,000 people participated.
Several regions of Portugal are particularly vulnerable to earthquakes, greater Lisbon and Algarve, for example.
We therefore encourage everyone, and we mean everyone, to participate in some way. It only takes one minute starting on 15th November at 11.15 hrs precisely. Whether you are at school, at work or at home with your family, this is something that affects you.
Details of A Terra Treme can be found on the dedicated website: http://www.aterratreme.pt/
Safe Communities Portugal announcement of the Exercise in English can be downloaded from Youtube here
The 1755 Lisbon earthquake, also known as the Great Lisbon earthquake, occurred on Saturday, 1 November, the holy day of All Saints’ Day, at around 09:40 local time. In combination with subsequent fires and a tsunami, the earthquake almost totally destroyed Lisbon and adjoining areas.
Seismologists today estimate the Lisbon earthquake had a magnitude in the range 8.5–9.0 on the moment magnitude scale, with its epicentre in the Atlantic Ocean about 200 km (120 mi) west-southwest of Cape St. Vincent. Estimates place the death toll in Lisbon alone between 10,000 and 100,000 people, making it one of the deadliest earthquakes in history.
Above picture 1755 Lisbon earthquake
According to historical records, most of the earthquakes affecting Portugal (mainland) have epicentre SW of the Iberian Peninsula (Gorringe bank) or in the Lower Tagus Valley. The most vulnerable areas are the Lisbon urban area and Algarve south. Major earthquakes: occoured in 1531, 1755, 1909 and 1969.
Emergency telephone numbers are available in a handy location
The accepted action to help protect yourself taught in countries at high risk of earthquakes, is to “drop, cover and hold” i.e. drop to the floor, take cover under a sturdy desk or table, and hold on to it firmly. More details can be downloaded here.
All prevention and protection information is from official sources.
“A Terra Treme” Earthquake exercise 2017 – Safe Communities Portugal together with Euroinesco participated in this exercise held on 13th October 2017, using “DROP, COVER, HOLD ON” . This can be viewed on YouTube here
Under the emergency plans for earthquakes over 200 entities are involved covering First aid and medical assistance; Forensics / Mortuary; Law and order; Buildings and Structures; Logistics; Communications and Vital networks
Tsunamis are rare events, but can be extremely deadly. In the past 100 years, 58 of them have claimed more than 260,000 lives, or an average of 4,600 per disaster, surpassing any other natural hazard. The highest number of deaths in that period was in the Indian Ocean tsunami of December 2004. It caused an estimated 227,000 fatalities in 14 countries, with Indonesia, Sri Lanka, India and Thailand hardest-hit.
Over 700 million people live in low-lying coastal areas and Small Island Developing States exposed to extreme sea-level events including tsunamis (IPCC).
Investing in resilient infrastructure, early warning systems, and education is critical to saving people and protecting their assets against tsunami risk in the future.
Tsunami is a series of giant waves. In Japanese, tsunami means ‘Harbour Wave’. A wave is created when energy passes through water. Moving air or wind provides energy to water, forming regular waves.
While on the ocean floor, when a tectonic plate suddenly slides beneath the other, the resulting earthquake releases tremendous amount of energy. This energy spreads outward from the point of earthquake, triggering waves that can form tsunami. Initially, these waves are small in size but they travel at great speeds. However, when the waves approach the shore, the rising seabed obstructs the energy of waves. This slows down the speed of waves. But the energy flux must remain constant leading to an increase in height of the waves, thus resulting in tsunami.
Certain areas of Portugal’s coastline are at risk of a Tsunami. A very useful video about Tsunamis and what action you should take in the event of a Tsunami can be downloaded here.