{"id":196,"date":"2015-05-15T01:39:25","date_gmt":"2015-05-15T01:39:25","guid":{"rendered":"https:\/\/tungsten2.gps.caltech.edu\/?page_id=196"},"modified":"2017-10-24T19:14:43","modified_gmt":"2017-10-24T19:14:43","slug":"20110901-m4-2-newhall","status":"publish","type":"page","link":"https:\/\/www.scsn.org\/index.php\/earthquakes\/speqrep\/20110901-m4-2-newhall\/","title":{"rendered":"2011\/09\/01 M4.2 Newhall"},"content":{"rendered":"

Egill Hauksson, Nancy King, Lucy Jones, Sinan Akciz, Karen Feltzer, Bob Dollar, Ken Hudnut, Kate Hutton, Anthony Guarino, Nick Scheckel) Version 1.0<\/p>\n

Update – Thursday, September 1st, 2011 – 3:23PM<\/h6>\n

The M4.2 earthquake was located in the northeast corner of the 1994 M6.7 Northridge aftershock zone. Because the 1994 aftershocks have mostly died off, this event is not considered to be an aftershock of the M6.7 event. The last M>4 event in this general region occurred in May 2009, located about 20 miles to the southeast. The M4.2 is located about 10 miles NE of the Northridge event and about 8 miles SW of the San Fernando – Sylmar event. The fault movement was horizontal, on a northwest striking plane. So far, eight aftershocks have occurred with the largest of M3.0 at 2:35 pm.<\/p>\n

\n\"ShakeMap\"
ShakeMap for the M4.3 Newhall Earthquake – felt widely throughout Southern California. Felt as far away as Edwards AFB to the north, Southern Orange County to the south.<\/figcaption><\/figure>\n

Magnitude M4 or greater events in the general area since 2000:<\/p>\n\n\n\n\n\n\n\n\n\n
YYYY\/MM\/DD HH:mm:SS.ss<\/th>\nET<\/th>\nMAG<\/th>\nM<\/th>\nLAT<\/th>\nLON<\/th>\nDEPTH<\/th>\nQ<\/th>\nEVID<\/th>\nNPH<\/th>\nNGRM<\/th>\n<\/tr>\n
2001\/01\/14 02:26:14.06<\/td>\nle<\/td>\n4.26<\/td>\nl<\/td>\n34.284<\/td>\n-118.404<\/td>\n8.8<\/td>\nA<\/td>\n9173365<\/td>\n177<\/td>\n916<\/td>\n<\/tr>\n
2001\/01\/14 02:50:53.69<\/td>\nle<\/td>\n4.05<\/td>\nl<\/td>\n34.289<\/td>\n-118.403<\/td>\n8.4<\/td>\nA<\/td>\n9173374<\/td>\n173<\/td>\n829<\/td>\n<\/tr>\n
2001\/09\/09 23:59:18.04<\/td>\nle<\/td>\n4.24<\/td>\nl<\/td>\n34.059<\/td>\n-118.388<\/td>\n7.9<\/td>\nA<\/td>\n9703873<\/td>\n140<\/td>\n1531<\/td>\n<\/tr>\n
2002\/01\/29 05:53:28.93<\/td>\nle<\/td>\n4.18<\/td>\nl<\/td>\n34.361<\/td>\n-118.657<\/td>\n14.2<\/td>\nA<\/td>\n9753485<\/td>\n129<\/td>\n1596<\/td>\n<\/tr>\n
2007\/08\/09 07:58:49.59<\/td>\nle<\/td>\n4.66<\/td>\nl<\/td>\n34.300<\/td>\n-118.620<\/td>\n7.6<\/td>\nA<\/td>\n14312160<\/td>\n303<\/td>\n2005<\/td>\n<\/tr>\n
2009\/05\/02 01:11:13.66<\/td>\nle<\/td>\n4.42<\/td>\nl<\/td>\n34.067<\/td>\n-118.882<\/td>\n14.2<\/td>\nA<\/td>\n10403777<\/td>\n179<\/td>\n2022<\/td>\n<\/tr>\n
2011\/09\/01 20:47:07.75<\/td>\nle<\/td>\n4.25<\/td>\nl<\/td>\n34.343<\/td>\n-118.481<\/td>\n7.4<\/td>\nA<\/td>\n11001205<\/td>\n28<\/td>\n2199<\/td>\n<\/tr>\n<\/table>\n
\n
\n<\/figure>\n\n\n\n\n\n\n
Estimated Population Exposed to Earthquake Shaking<\/caption>\n
EstimatedModified Mercalli Intensity<\/a><\/abbr><\/th>\nI<\/th>\nII-III<\/th>\nIV<\/th>\nV<\/th>\nVI<\/th>\nVII<\/th>\nVIII<\/th>\nIX<\/th>\nX<\/th>\n<\/tr>\n
Est. Population Exposure<\/th>\n11,839k*<\/td>\n4,664k<\/td>\n513k<\/td>\n44k<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n0<\/td>\n<\/tr>\n
Perceived Shaking<\/th>\nNot Felt<\/td>\nWeak<\/td>\nLight<\/td>\nModerate<\/td>\nStrong<\/td>\nVery Strong<\/td>\nSevere<\/td>\nViolent<\/td>\nExtreme<\/td>\n<\/tr>\n
Potential Structure Damage<\/th>\nResistant<\/th>\nnone<\/td>\nnone<\/td>\nnone<\/td>\nV. Light<\/td>\nLight<\/td>\nModerate<\/td>\nModerate\/Heavy<\/td>\nHeavy<\/td>\nV. Heavy<\/td>\n<\/tr>\n
Vulnerable<\/th>\nnone<\/td>\nnone<\/td>\nnone<\/td>\nLight<\/td>\nModerate<\/td>\nModerate\/Heavy<\/td>\nHeavy<\/td>\nV. Heavy<\/td>\nV. Heavy<\/td>\n<\/tr>\n<\/table>\n

*Estimated exposure only includes population within calculated shake map area<\/p>\n

Population Exposure<\/h5>\n
\n\"Population<\/a>
Population per ~1 sq. km. from LandScan<\/figcaption><\/figure>\n
Structure Information Summary<\/h5>\n

Overall, the population in this region resides in structures that are highly resistant to earthquake shaking, though some vulnerable structures exist.<\/p>\n

Historical Earthquakes (with MMI)<\/p>\n\n\n\n\n\n\n\n
Date (UTC)<\/th>\nDist<\/abbr>(km)<\/th>\nMag<\/abbr><\/th>\nMax MMI<\/abbr>(#<\/abbr>)<\/th>\nShaking Deaths<\/th>\n<\/tr>\n<\/thead>\n
1984-11-26<\/td>\n329<\/td>\n5.1<\/td>\nV (17k)<\/td>\n0<\/td>\n<\/tr>\n
1994-01-17<\/td>\n23<\/td>\n6.7<\/td>\nIX (181k)<\/td>\n33<\/td>\n<\/tr>\n
2003-12-22<\/td>\n275<\/td>\n6.6<\/td>\nVII (213)<\/td>\n2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Recent earthquakes in this area have caused secondary hazards such as landslides and liquefaction that might have contributed to losses.<\/p>\n

Selected Cities Exposed from GeoNames Database of Cities with 1,000 or more residents.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
MMI<\/th>\nCity<\/th>\nPopulation<\/th>\n<\/tr>\n<\/thead>\n
IV<\/td>\nSanta Clarita<\/td>\n169k<\/td>\n<\/tr>\n
IV<\/td>\nSan Fernando<\/td>\n25k<\/td>\n<\/tr>\n
II<\/td>\nNorth Glendale<\/td>\n203k<\/td>\n<\/tr>\n
II<\/td>\nGlendale<\/td>\n195k<\/td>\n<\/tr>\n
II<\/td>\nHollywood<\/td>\n168k<\/td>\n<\/tr>\n
II<\/td>\nPalmdale<\/td>\n135k<\/td>\n<\/tr>\n
I<\/td>\nLos Angeles<\/td>\n3,695k<\/td>\n<\/tr>\n
I<\/td>\nLong Beach<\/td>\n483k<\/td>\n<\/tr>\n
I<\/td>\nSanta Ana<\/td>\n343k<\/td>\n<\/tr>\n
I<\/td>\nAnaheim<\/td>\n328k<\/td>\n<\/tr>\n
I<\/td>\nRiverside<\/td>\n298k<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
Moment Tensor Solution for M4.2 Newhall Earthquake<\/figcaption><\/figure>\n
\n
For additional information check USGS<\/a>.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Egill Hauksson, Nancy King, Lucy Jones, Sinan Akciz, Karen Feltzer, Bob Dollar, Ken Hudnut, Kate Hutton, Anthony Guarino, Nick Scheckel) Version 1.0 Update – Thursday, September 1st, 2011 – 3:23PM The M4.2 earthquake was located in the northeast corner of…<\/span><\/p>\n

Read more ›<\/a><\/div>\n

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