1. Pelatihan : Techniques in Active Tectonic Study Juni 20-Juli 2, 2013 Instruktur: Prof. J Ramon Arrowsmith (JRA) Dari Arizona State University (ASU) - US Tempat Pelaksanaan: Ruang Pangea, Laboratorium Gempabumi (LabEarth) – Puslit Geoteknologi LIPI dan Kuliah lapangan akan dilakukan disekitar Sesar Lembang, Jawa Barat. * Lebih jelas baca TOR/KAK dan daftar acara

2. http://www.xkcd.com/723/ Why tweets might get to you before earthquake waves would

4. Test with an M4.3 earthquake near Morgan Hill California (30 March 2009 10:40:29 am local time at epicenter)

5. 30 Mar 2009 17:40:29 -- origin time -- -------------------- 30 Mar 2009 17:40:48omfg, earthquake! 30 Mar 2009 17:40:49earthquake! 30 Mar 2009 17:40:51earthquake? morgan hill, ca 30 Mar 2009 17:40:53Whoa. Earthquake???? 30 Mar 2009 17:40:53earthquake! 30 Mar 2009 17:40:54EARTHQUAKE 30 Mar 2009 17:40:57Earthquake! 30 Mar 2009 17:40:58Earthquake? 30 Mar 2009 17:40:59in an earthquake 30 Mar 2009 17:41:00earthquake 30 Mar 2009 17:41:00Oooh. Earthquake. 30 Mar 2009 17:41:00I think that was an earthquake 30 Mar 2009 17:41:00thinks we're having an earthquake. http://plurk.com/p/luod5 30 Mar 2009 17:41:01Earthquake in Silicon Valley! Love 'em! 30 Mar 2009 17:41:01yay earthquake! 30 Mar 2009 17:41:01just felt a mild earthquake 30 Mar 2009 17:41:03anyone feel the earthquake? 30 Mar 2009 17:41:03earthquake just happened! 30 Mar 2009 17:41:04Earthquake 30 Mar 2009 17:41:06earthquake 30 Mar 2009 17:41:07EARTHQUAKE!!!! 30 Mar 2009 17:41:07earthquake! 30 Mar 2009 17:41:08earthquake now people? 30 Mar 2009 17:41:08EARTHQUAKE!!! 30 Mar 2009 17:41:08Earthquake!!!! 30 Mar 2009 17:41:08anyone in the Bay Area just feel the earthquake? 30 Mar 2009 17:41:08Earthquake! 30 Mar 2009 17:41:09Minor earthquake. Maybe a 4 30 Mar 2009 17:41:09EARTHQUAKE!!!!! 30 Mar 2009 17:41:09EARTHQUAKE IN SJSU!!! 30 Mar 2009 17:41:10Earthquake hits South San Jose!? 30 Mar 2009 17:41:10I feel an earthquake in Sunnyvale, CA right now. 30 Mar 2009 17:41:10Earthquake in Santa Clara... building shaking 30 Mar 2009 17:41:11OMG, EARTHQUAKE! 30 Mar 2009 17:41:11Earthquake here in SJ, monitors shaking in the office. 30 Mar 2009 17:41:12Um, pretty sure I just felt a teeny-tiny earthquake 30 Mar 2009 17:41:12Earthquake? 30 Mar 2009 17:41:14Okay, earthquake.... Scared the crap outta me just now. 30 Mar 2009 17:41:14Oh shit, there was just an earthquake! Today is just plain ol crazy 30 Mar 2009 17:41:14earthquake in process 30 Mar 2009 17:41:15earthquake 30 Mar 2009 17:41:15Just has a small earthquake in SF

6. 30 Mar 2009 17:41:31WHOA earthquake. 30 Mar 2009 17:41:31Holy shit. Now *that* was an earthquake 30 Mar 2009 17:41:31Is it an earthquake we just felt? 30 Mar 2009 17:41:31Minor Earthquake here in the SF Bay Area. No details yet. I can see others noting it as well. 30 Mar 2009 17:41:31Aaah! Earthquake!! 30 Mar 2009 17:41:32That earthquake just now was so small it almost isn't worth mentioning. 30 Mar 2009 17:41:32Damn! I totally just missed an earthquake because I was walking. 30 Mar 2009 17:41:32little earthquake? or big truck? 30 Mar 2009 17:41:32Earthquake! 30 Mar 2009 17:41:33earthquake! 30 Mar 2009 17:41:33Earthquake?? 30 Mar 2009 17:41:34just felt an earthquake sitting in Mtn View library... not too scarey (yet)! 30 Mar 2009 17:41:35was that just an earthquake or is our foundation giving out? 30 Mar 2009 17:41:35earthquake felt in morgan hill 30 Mar 2009 17:41:35OMG. Earthquake? 30 Mar 2009 17:41:35Wow, big earthquake! (East bay/milpitas) probably a 5.x? 30 Mar 2009 17:41:36Earthquake! 30 Mar 2009 17:41:37I think that was an earthquake #fb 30 Mar 2009 17:41:38Earthquake!! 30 Mar 2009 17:41:38WOOT! Earthquake! 30 Mar 2009 17:41:38Small earthquake in the Bay Area. Almost as if Godzilla came stomping down the street. 30 Mar 2009 17:41:38Whoa! Just had an earthquake!... 30 Mar 2009 17:41:39Earthquake here http://tmeet.me/XXTY9 30 Mar 2009 17:41:39Earthquake just now...Menlo Park, CA 30 Mar 2009 17:41:39Nice earthquake! 30 Mar 2009 17:41:39Earthquake! Nice 30 Mar 2009 17:41:39earthquake in Redwood City 30 Mar 2009 17:41:40Earthquake in los gatos 30 Mar 2009 17:41:40anyone else feel that #earthquake?????? 30 Mar 2009 17:41:41Hmm. Small earthquake? Redwood City, CA. Or big truck? 30 Mar 2009 17:41:41Me too! (Earthquake!) 30 Mar 2009 17:41:41earthquake! 30 Mar 2009 17:41:42either just had a small earthquake or the guy with the jackhammer outside my window hit the foundation! 30 Mar 2009 17:41:43Whoa earthquake! Not up yet here: http://quake.usgs.gov/recenteqs/ 30 Mar 2009 17:41:44Earthquake in Santa Clara. Not major - 3 seconds of slight wobbling...

7. 30 Mar 2009 17:41:55Felt my first earthquake! 30 Mar 2009 17:41:55Earthquake! Just rumbled through 1 min ago here in San Jose! Nice little shake up! 30 Mar 2009 17:41:55Yay! Earthquake! 30 Mar 2009 17:41:55Earthquake! 30 Mar 2009 17:41:56just felt that special feeling; an earthquake. Gives me that little rush of adrenaline. Didn't bolt for a doorway, so not too big. 30 Mar 2009 17:41:56cat curled up in my arm didn't like that earthquake 30 Mar 2009 17:41:57Wow, #earthquake in San Jose. That was a shaker! 30 Mar 2009 17:41:57earthquake!.. in mt. view now.. that was a small cute one... 30 Mar 2009 17:41:57Just felt an earthquake at my desk! (in Mountain View) #google 30 Mar 2009 17:41:58Earthquake! 30 Mar 2009 17:41:59Ummm, HELLO!!! Huge earthquake! 30 Mar 2009 17:41:59Earthquake! 30 Mar 2009 17:42:00earthquake 30 Mar 2009 17:42:00well what do you know... an earthquake 30 Mar 2009 17:42:01Just had a little earthquake! 30 Mar 2009 17:42:02Earthquake just now in San mateo? 30 Mar 2009 17:42:03Earthquake ahhhhh!! 30 Mar 2009 17:42:03If I'm not mistaken, Silicon Valley just had an earthquake. Not the Big One. Just big enough to be felt. 30 Mar 2009 17:42:03woo hoo, just had a little earthquake 30 Mar 2009 17:42:06Just felt an earthquake. 30 Mar 2009 17:42:06Just felt a very teeny tiny earthquake, unless I have monsters under my bed 30 Mar 2009 17:42:07ditto on the earthquake from santa cruz 30 Mar 2009 17:42:08Wants to know what's shakin'... oh wait, that was an earthquake! 30 Mar 2009 17:42:08earthquake in Menlo Park! - Some excitement for Sand Hill Rd this am. Heidi says 4.0 30 Mar 2009 17:42:08OH SHIT!!!! EARTHQUAKE!!!!! 30 Mar 2009 17:42:09Whoa, I felt a little earthquake or a giant dog just humped the building. Did anyone else feel that? 30 Mar 2009 17:42:09Just felt an earthquake 30 Mar 2009 17:42:09Whoa. Earthquake!! 30 Mar 2009 17:42:10Just experienced an earthquake here in Sunnyvale, CA 30 Mar 2009 17:42:1010:40 Just felt an earthquake. Always fun, eh? 30 Mar 2009 17:42:11EARTHQUAKE!!!!!!! 30 Mar 2009 17:42:11Small earthquake here in Sunnyvale 30 Mar 2009 17:42:13Woo! Earthquake...how's that for exciting... 30 Mar 2009 17:42:13Well, that was an earthquake. 30 Mar 2009 17:42:13just felt the earthquake. Neato! 30 Mar 2009 17:42:14earthquake in Sunnyvale 30 Mar 2009 17:42:14earthquake - just felt a 5 sec tremor in SF 30 Mar 2009 17:42:18 did you feel the earthquake? just shookm... san jose 95134

8. Morgan Hill California example: extracting all geocoded tweets containing the word “earthquake” within a 200-km radius of the event.

9. “The potential response time for a Twitter-based earthquake detector is impressive. The typical delay for tweet transmission, according to Twitter engineers, is about five seconds. By running a simple automatic algorithm, the Morgan Hill earthquake could have been detected in under a minute. How does this compare to current U.S. Geological Survey response time? Currently, the Northern California Seismic Network (NCSN) releases earthquake information faster than any network contributing to the Advanced National Seismic System (ANSS). The first solution issued by the NCSN is an automatic “quick look” solution that has a hypocenter but no magnitude. For the Morgan Hill earthquake, the quick look solution was released in 22 seconds.”

10. USGS did you feel it? For Morgan Hill event

11. http://www.youtube.com/watch?v=ug-vjWEKBGg

12. http://miguelrios.tumblr.com/post/ 9338564551/spread-of- earthquake-related-tweets 40,000 tweets in the first minute after the earthquake http://173.254.16.66/rnd/quake- map/?size=large http://blog.socialflow.com/post/712024413 2/all-shook-up-mapping-earthquake-news- on-twitter-from-virginia-to-maine

13. Time of first identified earthquake tweet per unique identified location vs. distance of that location from epicenter, we can see a clear clustering form around the earthquake’s path. The points further away (above the red line) represent people responding to those experiencing the quake. The slope of the line aligns well with the speed at which the quake is estimated to have spread (around 3km/s).

14. http://earthquake.usgs.gov/earthquakes/dyfi/events/se/082311a/us/index.html