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Today in Earthquake History

Today in Earthquake History

Today's Earthquake Fact:
The term seismic seiche was first coined by Anders Kvale in 1955, to describe oscillation of lake levels in Norway and England caused by the Assam earthquake of August, 1950.

August   31

Note: All earthquake dates are UTC, not local time.


Year Location Magnitude Comment
1888 North Canterbury, New Zealand

Epicenter
7.0-7.3 120th Anniversary

Local time: September 1, 1888 04:10 a.m. NZST

The earthquake in northern Canterbury, some 100 kilometers from Christchurch, caused the partial collapse of the cathedral's spire. This earthquake originated at a shallow depth and ruptured to the surface along the Hope Fault, west of Hammer Springs. This was the first scientific observation of strike-slip faulting.
From The how, what and where of an earthquake by Warwick Smith.

The North Cantebury earthquake of September 1, 1888 by H.A. Cowan. (PDF)

Damage Photo
The 1888 earthquake caused a 2.6-metre horizontal offset on the Hope Fault, visible in this fenceline at Glynn Wye. The fence has been re-strung, but the posts have not been moved. This photograph appears to be the world's first to show horizontal fault movement caused by an earthquake.
From Historic earthquakes, Te Ara - the Encyclopedia of New Zealand.
(Photo by Geologist Alexander McKay)
1968 Dasht-e Bayaz, Iran

Epicenter
7.3 40th Anniversary

7,000 to 12,000 deaths.
Five villages were totally destroyed in the Dasht-e Bayaz area, and another 6 from Kakhk to Salayan had at least half of the buildings destroyed. A strong aftershock on Sep 01 destroyed the town of Ferdows (see next event). In all, more than 175 villages were destroyed or damaged in this rather sparsely populated area of Khorasan Province. Most buildings in the area were built of adobe with very thick (1-2 m, or about 3-6 ft) arched roofs. The walls shattered, bringing tons of material down on the people inside. This was a major reason for the severity of damage and casualties in this earthquake. The death toll would likely have been much higher if this quake would have struck in the middle of the night, when many more people would have been indoors. The few steel-frame or brick-and-mortar structures in the area generally survived with only minor to moderate damage, making it difficult to assign a maximum intensity to the quake. The intensity estimates range from VIII to X. Surface faulting occurred in a zone about 80 km (50 mi) long. The maximum strike-slip (horizontal) offset was about 4.5 m (15 ft) near Dasht-e Bayaz with a vertical offset of about 2 m. Extensive ground ruptures and sandblows occurred in the Nimbluk Valley east of Salayan, south of the main fault trace.

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