science

National Seismological Service

National Seismological Service is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand National Seismological Service rather than just read about it. In short: The National Seismological Service (Spanish: Servicio Sismológico Nacional, SSN) is a seismological organization in Mexico that studies and records earthquake activity within the country. It is part of the Geophysics Institute at the National Autonomous University of Mexico (UNAM) and is based in Mexico City.

Key takeaways

National Seismological Service belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect National Seismological Service to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of National Seismological Service from memory before moving on to harder problems.

Reference excerpt

The National Seismological Service (Spanish: Servicio Sismológico Nacional, SSN) is a seismological organization in Mexico that studies and records earthquake activity within the country. It is part of the Geophysics Institute at the National Autonomous University of Mexico (UNAM) and is based in Mexico City. It operates Mexico’s national seismological network, keeps records of earthquakes The SSN was founded on September 5, 1910, by the federal government as part of an international effort to monitor seismic activity. The SSN established its first nine earthquake monitoring stations were installed between 1910 and 1923, including seven that have operated continuously since as the oldest system in North America. It was transferred to UNAM in 1929 and became part of the UNAM Geophysics Institute in 1948. The National Seismological Service keeps the seismological records accumulated since January 20, 1900. There are more than 201 thousand earthquakes in catalog and paper records since 1906. Since 1958 it has a very high-quality database with seismic data. All these data are in the process of digitization to be stored in the Earth Sciences Library.The institution also works as a research center, mainly for scientists of the National Autonomous University of Mexico, but also from the Instituto Politécnico Nacional and other state universities. The institution cooperated with others such as the Incorporated Research Institutions for Seismology (IRIS), USGS and the Pacific Tsunami Warning Center (PTWC) Currently Mexico’s national seismological network has 98 seismic observatories, 68 broadband stations and 30 in the Valley of Mexico. The broadband stations transmit via satellite about a thousand data packages per second in real time, whether there's an earthquake or not. Each package contains speed, acceleration and GPS position among others, with 100 samples per second. A number of portable monitoring stations have been installed in Mexico City, making it the most supervised city in Latin America. An alternate monitoring center is on the works in Pachuca, Hidalgo, as a redundancy outside the risk zone of Mexico City.

References

Further reading Pérez-Campos, Xyoli; Suárez, Gerardo (2020), "110th Anniversary of the Mexican National Seismological Service: An Account of Its Early Contributions", Seismological Research Letters, doi:10.1785/0220200157

External links National Seismological Service / Servicio Sismológico Nacional (UNAM)

Illustrations

Worked examples

Example 1 — a first encounter with National Seismological Service

Start with the simplest possible case. Write down what National Seismological Service claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to National Seismological Service before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about National Seismological Service ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of National Seismological Service

In research: National Seismological Service appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses National Seismological Service in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: National Seismological Service is common in secondary-school and first-year university syllabi. It links to neighbouring topics Science and technology in Mexico, Scientific organizations established in 1910, Seismological observatories, organisations and projects, so understanding it makes those chapters shorter.
In everyday life: Look for National Seismological Service outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study National Seismological Service in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what National Seismological Service means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain National Seismological Service out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is National Seismological Service in simple terms?

Why does National Seismological Service matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study National Seismological Service?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on National Seismological Service.