With a day off in Dili, I had a chance to look over the data recorded overnight in Maliana and Oecussi. It is always valuable to look at data while in the field, as it gives a chance to make any adjustments. Also, with the upcoming presentation I will give to IPG, I will be able to show examples of the record that we will be creating. I looked up local earthquakes from the USGS real-time webpage and found a few good candidates.
|A catalog of earthquakes that occurred between 19-21 March in the region. The event depicted by the light blue dot was recorded in Maliana, Timor Leste.|
Because the two records I looked at were from the nights of 19 and 20 March, I had about 12 hours of data to look at from each station. Maliana recorded data on the night of 19 March, and we were lucky to have a magnitude 5.2 earthquake occur off to the east in the eastern Banda Sea. The record from our station clearly recorded this event:
|The record for the entire event. The P wave arrived in Maliana around 7 minutes after the earthquake occurred. |
|A zoom into the P wave arrival. The middle trace is the vertical component - it shows the P arrival well.|
|A zoom into the S wave arrival. The top and bottom traces are the E-W and N-S components, respectively.|
An encouraging sign indeed, especially in light of my concern that this station lies on the perimeter of a large sedimentary basin. The record from the Oecussi station also revealed a few verified events, but displayed a lot of noise from motorcycles passing by on a nearby road. I won't be surprised if we relocate the station in the future, but the record will make it clear if this is necessary. For now, it is time to finish up the installation - on to Same and Atauro!