Question
Make a study guide for these slides.
Remember these key points about Nepal’s earthquake sequence.
- April 25: magnitude 7.8, about 80 kilometres northwest of Kathmandu. May 12: magnitude 7.3, about 80 kilometres northeast of Kathmandu. 1
- Most earthquakes involved shallow-angle thrust faulting, likely on the Himalaya Thrust. Some aftershocks involved normal faulting. 2
- Mainshock peak slip exceeded four metres. Its dimensions were about 120 by 80 kilometres. 3
- Aftershock activity decreased rapidly before May 12, 17 days after the mainshock. 4
- ShakeMap estimates near the mainshock were uncertain. There were few intensity observations and no strong-motion data. 5
- PAGER’s median mainshock estimates were about 9,000 deaths and four billion dollars in direct losses. 6
- Median aftershock estimates were about 160 deaths and 60 million dollars in direct losses. 7 The slides do not explain the loss calculation method.
Sources in the slide deck · choose one to see it on the slide
- 1 Slide 4 Show on slide M 7.8 mainshock on 04-25, ~80 km NW of Kathmandu. ~100 subsequent aftershocks, most east of mainshock. M 7.3 aftershock on 05-12, ~80 km NE of Kathmandu.
- 2 Slide 5 Show on slide “Most EQs shallow angle thrust faulting; likely on decollement of Himalaya Thrust. Some normal fault aftershocks.”
- 3 Slide 6 Show on slide “Peak slip >4m. Dimensions ~120 x 80 km.”
- 4 Slide 8 Show on slide “Subsequent aftershock sequence decayed rapidly, until M7.3 aftershock on 05-12, 17 days after mainshock.”
- 5 Slide 11 Show on slide “Shaking estimates in epicentral region are poorly constrained due to fewer intensity observations (as well as lack of strong motion data).”
- 6 Slide 15 Show on slide “Median loss estimation: ~ 9,000 fatalities ~ $4B direct economic loss”
- 7 Slide 16 Show on slide “Median loss estimation: ~ 160 fatalities ~ $60M direct economic loss”
Saved answer, written by AI from the full sample slide deck. Every quote was checked word for word against its slide.
Slides by Gavin Hayes and colleagues, U.S. Geological Survey (public domain). Three slides that credit outside photos or map imagery are left out, so slide numbers differ from the original. Original slides