Far more significant was a mod to the building code passed in a special session of the City Council on October 9. 1923 01 22 - Humbolt County, California - M 7.2 5. The Alexander fault zone may have particular significance because of possible ground rupture in October (see section on Surface Breaks). "M 5.5 - Turkmenistan-Iran border region", "Significant Earthquake: IRAN: NE KHURASAN PROVINCE", "Significant Earthquake: SOLOMON ISLANDS: SANTA ISABEL ISLAND", "M 6.1 - near the east coast of the Kamchatka Peninsula, Russia", "M 6.2 - State of Yap, Federated States of Micronesia", "M 6.2 - near the coast of northern Peru", "M 6.1 - Kyrgyzstan-Xinjiang border region", "Significant Earthquake: CHINA: XINJIANG PROVINCE: WUSHI", "Significant Earthquake: INDONESIA: SULAWESI: PARASANGA, PALETOANG", "Significant Earthquake: PORTUGAL; MOROCCO: RABAT, SALE; SPAIN: CANARY IS", "M 6.3 - near the south coast of Papua, Indonesia", "M 6.0 - Baja California-Sonora border region, Mexico", "Significant Earthquake: TURKEY: DEMIRCI, GORDES, SINDIRGI", "Significant Earthquake: TURKEY: ALASEHIR, SARIGOL, KIRAZ", "Significant Earthquake: ETHIOPIA: SARDO", "Significant Earthquake: EGYPT: BENI-SOUEF, AL-QAHIRAH (CAIRO)", "M 6.5 - New Ireland region, Papua New Guinea", "M 6.9 - Andreanof Islands, Aleutian Islands, Alaska", "M 6.0 - Guadeloupe region, Leeward Islands", "M 6.5 - Maug Islands region, Northern Mariana Islands", "Significant Earthquake: CHINA: BOHAI SEA", "M 6.4 - near the coast of southern Peru", "Significant Earthquake: PERU: LAMPA-JUNIN,HUAYTAPALLANA", "Significant Earthquake: CHINA: GUANGDONG PROVINCE: YANGJIANG COUNTY", "Significant Earthquake: RUSSIA: SHIKOTAN ISLAND, KURILSKIYE", "M 6.7 - Andreanof Islands, Aleutian Islands, Alaska", "Significant Earthquake: CHINA: XINJIANG PROVINCE", "Significant Earthquake: SOUTH AFRICA: CAPE PROVINCE", "Significant Earthquake: PERU: HUAYTAPALLANA, LAMPA, CHILIFRUTA", "Significant Earthquake: CALIFORNIA: SANTA ROSA", "Significant Earthquake: BALKANS NW: BOSNIA-HERZEGOVINA: BANJA LUKA", "Significant Earthquake: BALKANS NW: BOSNIA-HERZEGOVINA: KAKASI, JABLAN", "M 6.6 - Andreanof Islands, Aleutian Islands, Alaska", "M 7.6 - off the west coast of northern Sumatra", "M 7.4 - near the east coast of the Kamchatka Peninsula, Russia", "Significant Earthquake: RUSSIA: OFF KAMCHATKA", "M 7.2 - east of Dominica, Leeward Islands", "Significant Earthquake: GUADELOUPE: GRAND BOURG", https://en.wikipedia.org/w/index.php?title=List_of_earthquakes_in_1969&oldid=972000373, Creative Commons Attribution-ShareAlike License.
Maximum intensities are indicated on the Mercalli intensity scale and are sourced from United States Geological Survey (USGS) ShakeMap data. This information is relayed to a duty seismologist at the NEIC who lo cates the epicenter graphically on … Sequences of medium-width marks indicate the day of the year, hour, and minute in Greenwich Mean Time---the standard time for all seismograph stations. And here is where our story shifts from being the tale of a forgettable earthquake into a tragedy about destroying a town’s core. Don’s Park Auto Super across from the Junior College was partially burned and there was a chemical fire in a Memorial Hospital laboratory after the second quake.
Fifty-two other monuments shifted or rotated on their bases. The IRIG C time trace provides precise time and date in coded form with narrow marks at half-second intervals and broad marks each 5 seconds.
Remove Cookies This building had recently been condemned for failing to meet Field Act standards but was still in active use at the time of the shock. The city is on the east side of Santa Rosa Valley, and intermontane valley of the Cost Ranges, bounded on the west by the Mendocino Range and on the east by the Sonoma and Mayacmas Mountains. No well logs are listed for the central section of the city in the Cardwell report. It is the first time in recorded history El Paso has felt earthquakes … Photo by Santa Rosa Press Democrat. The 5.5 magnitude tremor that struck north of the Western Cape on Tuesday, killing one person, revived memories for Ceres residents who were caught in 1969 in the biggest earthquake … Change Cookie Consent
[i] The epicentre of the earthquake was situated in Saron, a region near Tulbagh. There were only two fires that night, which was incredibly lucky because there were wind gusts. Here, along Poppy Drive, the asphalt paving was crossed by several dozen fresh cracks oriented both northwest across the road and also northeast, parallel to the road. The first-motion data are indicative of a non-vertical fault plane, the three well-determined fault plane solutions giving dips of 70 to 80 degrees northeast. Damage was major at the IOOF and Rural Cemeteries, very minor at the Calvary Cemetery and slight at the Shiloh Cemetery. For the past 30 years, however, seismologists have been able to assign epicenters more confidently, based on instrumental data, and some of the coordinates listed for events since the late 1940s were derived from such data.
Overall, structures were prepared for the earthquake and responded well, sustaining slight, if any, damage.
Detailed fault plane solutions, based on the radiation pattern of the P-waves, exist for the two large shocks of October, as well as for the April 1968 shock. The only other known bridge damage was repeated pounding at the construction joints in the sidewalks over the abutments of the Brookwood Avenue bridge at Matanzas Creek. The Santa Rosa Valley is covered mainly by alluvium of several generations and on the west side by unconsolidated sands, gravels and silty clay forming low hills and undulating topography.
Residents there reported several damaged chimneys and articles shaken from shelves and walls.
Structural damage was confined almost exclusively to the city of Santa Rosa. However, the time stopped from Banja Luka at 8:53 am. The earthquake that took lives and destroyed the city measured […] The Roxy theater at Fifth and B also had broken fire escapes, and parts of the ceiling had fallen on the audience of the adult-only movie house (“Escorted Ladies Free”). The cracks appeared in a zone of filled ground adjacent to the swamp; thus they appeared to be the result of heavy shaking of marshy substrata. This is a list of earthquakes in 1969. M. H. Within 17 hours of the time the initial shocks had rocked the Santa Rosa area the National Center for Earthquake Research, U. S. Geological Survey, had begun to install a network of portable seismographs to monitor aftershock activity. A study of most recent fault traces in the Sonoma Mountains is underway by Gladys Louke for the U. S. Geological Survey, and a nine-Bay-counties planning study financed jointly by the U. S. Departments of Interior and Housing and Urban Development was initiated by the U. S. Geological Survey on January 1.  The focal depths of the two mainshocks were 9.6 km and 10.4 km respectively.
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