On 25th February, 2018, an earthquake measuring magnitude 7.5 occurred at 4a.m local time, in a rural, jungle area of the Southern Highlands in New Guinea, Papaua New Guinea. It wasn’t immediately clear if there was damage. No tsunami watches or warnings were issued because of the quake.
At the location of this earthquake, the Australia plate is converging with the Pacific plate and it occurred as the result of thrust faulting at shallow a depth. Thrust-faulting events of the size of the February 25th, 2018 earthquake are typically about 85×30 km (length x width).
The earthquake was recorded at seismic stations worldwide, including stations of the Irish National Seismic Network (INSN), see seismic waveforms below (select figure to enlarge).
An earthquake with magnitude 4.4 occurred in South Wales on the 17th February 2018 at 14:31:07.6 UTC. For more details please see this post on the INSN homepage.
An earthquake with magnitude 7.2 occurred in southern Mexico on the 16th February 2018 at 23:39:39 UTC. For more details please see this post on the INSN homepage.
13 February 2018 – Seminar
When: 16:00 on Tuesday, 13th February 2018
Where: DIAS, Geophysics Section, 5 Merrion Square, Dublin 2, (library)
Speaker: Ben Mather (DIAS, Dublin, Ireland)
Title: Estimating the depth to the Curie isotherm: a synthesis of the methodology and its application to Ireland.
Magnetic data is one of the most common geophysics datasets available on the surface of the Earth. At long wavelengths it pertains information on the depth at which rocks lose their magnetism. This is called the Curie depth – often interpreted as the 580C isotherm, which is the Curie point of magnetite. In this talk I will outline the methodologies to compute Curie depth and the resolution of thermal structures it can detect. The ongoing acquisition of the magnetic anomaly by Tellus presents a unique opportunity to glean precise estimates of the 580C isotherm, which can be assimilated into large scale thermo-chemical models of the lithosphere.
An earthquake with magnitude 8.0 occurred on the 23rd January 2018 at 09:31:41 UTC in the Gulf of Alaska. For more details please see this post on the INSN homepage.
A magnitude 7.2 earthquake occurred on the 14th January 2018 at 09:18:46 UTC near the southern coast of Peru. For more details please see this post on the INSN homepage.
A magnitude 7.6 earthquake occurred on the 10th January 2018 at 02:51:32 UTC north of Honduras. For more details please see
Earthquakes and other Geohazards
Despite its lack of large earthquakes, Ireland holds a special place in the history of Earthquake studies thanks to the pioneering work of Robert Mallet in the mid-19th century. Come see the past and present of live earthquake monitoring worldwide, from the heart of Dublin.
Location: Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2
Date: 16th November 2017
Time: 19:00 – 20:00 and 20:30 – 21:30
There are a limited number of tickets for this FREE event. Please go to: