Earthquake with magnitude of ML 0.9 on date 26-05-2011 and time 03:38:46 (UTC) in region 5 km E Velletri (RM)

A magnitude ML 0.9 earthquake occured in region: 5 km E Velletri (RM), on

  • 26-05-2011 03:38:46 (UTC)
  • 26-05-2011 05:38:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6680, 12.8390 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Velletri RM 6 53303 53303
Cori LT 7 11065 64368
Lariano RM 7 13432 77800
Rocca Massima LT 7 1136 78936
Cisterna di Latina LT 8 36868 115804
Artena RM 10 14276 130080
Lanuvio RM 11 13632 143712
Nemi RM 12 1943 145655
Genzano di Roma RM 13 23970 169625
Labico RM 14 6379 176004
Valmontone RM 14 15959 191963
Norma LT 14 3946 195909
Rocca di Papa RM 15 17034 212943
Ariccia RM 15 19407 232350
Rocca Priora RM 15 11962 244312
Colleferro RM 16 21595 265907
Segni RM 16 9159 275066
Albano Laziale RM 16 41715 316781
Montelanico RM 17 2131 318912
San Cesareo RM 18 15153 334065
Aprilia LT 18 73446 407511
Sermoneta LT 18 9842 417353
Monte Compatri RM 18 11978 429331
Castel Gandolfo RM 18 8997 438328
Gavignano RM 18 1916 440244
Cave RM 19 11287 451531
Marino RM 19 43026 494557
Zagarolo RM 19 17843 512400
Monte Porzio Catone RM 19 8693 521093
Palestrina RM 20 21672 542765
Grottaferrata RM 20 20327 563092
Colonna RM 20 4287 567379

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of Velletri (53303 inhabitants)
18 Km E of Aprilia (73446 inhabitants)
23 Km N of Latina (125985 inhabitants)
28 Km E of Pomezia (62966 inhabitants)
30 Km NE of Anzio (54211 inhabitants)
33 Km S of Tivoli (56533 inhabitants)
38 Km S of Guidonia Montecelio (88673 inhabitants)
39 Km SE of Roma (2864731 inhabitants)
51 Km E of Fiumicino (78395 inhabitants)
89 Km SW of L'Aquila (69753 inhabitants)
99 Km E of Civitavecchia (52991 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 1.7
ML 0.9
2011-05-26
03:38:46
41.668 12.839 10 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1221839
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-05-26 03:38:46 ± 0.16
Latitude 41.6680 ± 0.0099
Longitude 12.8390 ± 0.0108
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1221839

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1316
Semi-minor axis of confidence ellipse (meter) 579
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
Circular confidence region, given by single value of horizontal uncertainty (meter) 1421.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 206
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32915
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 3
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 1221839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:58:20

Md:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1221839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:58:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTGR.SHZ. 2011-05-26T03:39:11.57 10.0 undecidable manual Pg 0 0 0
IV.GUAR.HHZ. 2011-05-26T03:39:00.80 10.0 undecidable manual Pg 0 0 0
IV.GIUL.HHE. 2011-05-26T03:38:59.38 0.3 undecidable manual Sg 109 36.5412 0.144 98
IV.CERT.HHN. 2011-05-26T03:38:58.43 0.6 undecidable manual Sg 21 33.2445 0.061 67
IV.CERT.HHN. 2011-05-26T03:38:53.39 0.3 undecidable manual Pg 21 33.2445 -0.083 100
IV.GIUL.HHE. 2011-05-26T03:38:53.75 0.3 undecidable manual Pg 109 36.5412 -0.223 97
IV.RDP.HHZ. 2011-05-26T03:38:52.64 0.6 undecidable manual Sg 315 14.2746 -0.181 68
IV.RDP.HHZ. 2011-05-26T03:38:50.51 0.3 undecidable manual Pg 315 14.2746 0.241 100
IV.CAFE.HHE. 2011-05-26T03:38:45.38 10.0 undecidable manual Pg 0 0 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download