Skip to main content

Modeling Tsunamis and Monitoring Earthquakes: an Interview with Geophysicist and MSS Speaker Diego Melgar

-->
By Talya Klinger, MSS Intern

How can we meet the computational challenge of modeling and monitoring earthquakes in real time, and how can we anticipate and prepare for natural disasters? Diego Melgar, Ph.D. of the UC Berkeley Seismological Laboratory, is investigating these questions and more. As an assistant researcher, he develops earthquake models and tsunami warning systems using high-rate GPS data, paving the way for better earthquake preparation.

1. How did you first get interested in seismology?

I grew up in Mexico City, where earthquakes, volcanoes, hurricanes and other natural hazards are a fact of life. I've also always liked math and physics, and so, when it was time to go to college and select a program, I looked around and I found a geophysics degree at the National University that studied the Earth and its physics with lots of math. It seemed like a great idea to me!

2. What are some of the most challenging aspects of modeling natural disasters in real-time?

That they are complex and that measurements are sparse. Many things are going on during an earthquake or any other natural hazard, they're really complicated! Saying something about them very quickly with sparse observations and being right about it is a real challenge.

3. How do you go about making tsunami propagation models more efficient?

We run them in parallel on bigger computers. We can now make very detailed models of the tsunami in less than one minute.

4. How does the technique of real-time monitoring impact geological research and natural disaster preparation?

 Basic research allows us to find out what are the laws of physics and chemistry that make earthquakes and other hazards do what they do, it lets us find about what makes the Earth tick. In turn, the more we know about the physics and chemistry of the Earth the more intelligent we can make our warning systems, we can provide more relevant and precise information in shorter periods of time.

5. Tell us about your work in analyzing the magnitude 7.8 earthquake in Nepal: what did you discover about its source?

Nepal was a very interesting event because in spite of the fact that there were thousands of casualties and widespread destruction, it really could have been a lot worse. Given the state of development of the country we could have easily seen 150,000 casualties like we did in Haiti in 2010, but we did not. After some research we learned that part of the reason for this is that the earthquake rupture was very smooth and that smoothness lead to less shaking than we would have expected.

6. Finally, what advice do you have for students who are interested in seismology, geophysics, or signal processing?

Learn physics, learn math, and learn computers. Earth sciences are an incredibly rich field where these tools are really important. But also go outside, go hiking, look at rocks, notice how each one is different and wonder where they came from. The Earth is a beautiful laboratory and we should enjoy it with our minds but we should also go out and experience it.

To find out more, watch Dr. Melgar's Marin Science Seminar presentation on November 18th, 7:30-8:30 pm at Terra Linda High School, Room 207.
Post a Comment

Popular posts from this blog

Invention in Medicine this Wed. 10/26/16

Marin Science Seminar for Teens & Community Presents Invention in Medicine How Medical Devices get Invented and Go to Market with Art Wallace MD PhD of UCSF & VAMC SF
Wednesday, October 26, 2016 7:30 - 8:30 pm Terra Linda High School, Room 207 320 Nova Albion, San Rafael, CA 94903 


Art Wallace started out in experimental surgery and radiology studying imaging of the heart using CT
scanners. He has worked on a number of devices that originally were built for experimental studies that evolved into clinically useful devices including a cardiac output monitor, the off pump CABG, off pump aneurysm surgery, electronic sedation, and a selective coronary vasodialtor. Dr. Wallace will explain his experiences with the inventive process using examples from both device design and drug development. There will be a brief discussion of the importance of intellectual property, patents, venture capital, FDA approval, and business development in completing the invention process. There will …

An Interview With Diara Spain, Ph.D

By Rachael Metzger, MSS Intern

Ocean acidification is an issue becoming apparent in the effects on both sea creatures and humans. Diara Spain, the Associate Professor of Biology at Dominican University, came to Marin Science Seminar to talk to us about her studies in marine invertebrates and the damage ocean acidification is causing them. 

To learn more about Diara Spain and what inspired her studies we conducted an interview:


1. How did you get interested in biology? Is there a time, event, 
or person in your life that inspired you to pursue the study? I've always been interested in biology, really science in general. I grew up in rural North Carolina and as a kid it was expected that you'd spend most of your free time outside playing with your friends and pets.  One thing that sparked my interest in marine organisms were the summer vacations at the undeveloped beaches in North Carolina. 
2. Why did you specifically decide to focus on functional morphology, locomotion in echinode…

Marin Science Seminar Internships Still Available

Marin Science Seminar still has two high school student internship spaces available. Interns must be able to attend science seminars on select Wednesday evenings at Terra Linda High School in San Rafael. Interns arrive at 7 pm to set up, assist with the seminar, and can leave when the seminar is cleaned up by 8:45 pm. Specialties are also available for students interested in writing, photography, videography, and social media.

Start your application online today at this link!
See the calendar here: http://www.marinscienceseminar.com/calendar.html

More information about MSS internships can be found on the website at this link:
http://www.marinscienceseminar.com/interns.html

 Join us and learn!