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On April 6, 2009 an earthquake of Magnitude 6.2 (M w ) struck the Abbruzzo region of Italy causing widespread damage to buildings in the city of L'Aquila and surrounding areas. This paper summarizes field observations made by the Earthquake Engineering Field Investigation Team (EEFIT) after the event. The paper presents an overview of seismological and geotechnical aspects of the earthquake as well as a summary of the observed damage to buildings and infrastructure. A brief overview of the earthquake casualties is also reported.

At 06:50 on Monday 14 th August 2017, a hillslope on the Freetown Peninsula, Sierra Leone, collapsed, sending 300,000 m 3 of debris into the flooded valley below. As this debris mixed with floodwater it became a sediment-laden flood which entered a drainage channel and travelled 6 km to the coastline. The event destroyed nearly 400 buildings, claimed the lives of an estimated 1,100 people and affected approximately 5,000 people. The mechanism was a two-stage rainfall-triggered landslide followed by a channelised debris-laden flood. The processes were similar to the nearby 1945 event in Charlotte, which killed at least 13 people.

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This paper describes the observations made by a reconnaissance team following the 22 nd February 2011, M w 6.3, Christchurch, New Zealand earthquake (GNS Science; 2011). The team comprised of members of the UK based Earthquake Engineering Field Investigation Team (EEFIT) who spent five days collecting observations on damage resulting from the earthquake. Although the magnitude of this earthquake was not particularly high (M w 6.3), the shallow focus and close proximity resulted in locally very high ground motions, widespread damage and 182 fatalities. The earthquake is also particularly notable for the widespread liquefaction it caused, landslides and rockfalls in the hills south of Christchurch, and the significant damage suffered by unreinforced masonry and historic structures. Over wide areas of central Christchurch, recorded accelerations were in excess of those required by the current New Zealand seismic loadings standard (NZS1170.5:2004): Standards New Zealand (2004), and therefore the earthquake presented a valuable opportunity to assess performance of modern buildings under code-level ground acceleration.

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The UK Earthquake Engineering Field Investigation Team (Eefit) was established as an independent society in 1982. Between 1984 and 2011, it carried out field missions to 29 earthquake zones, with reports on all of them freely available online. Over a hundred UK-based engineers have participated, split almost equally between industry and academia. There have been a number of significant benefits, including training through observations of the practical effects of ground shaking, fostering strong links between practising and academic participants, establishing international links and gathering data for research into a wide range of earthquake engineering topics. The paper outlines Eefit’s history and development, sets out its achievements and presents details of a recent 5-year government grant that will extend its effectiveness still further.