Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 29-07-2017 and time 09:53:44 (Italy) in region 2 km SW Tivoli (RM)

A magnitude ML 0.5 earthquake occured in region: 2 km SW Tivoli (RM), on

  • 29-07-2017 07:53:44 (UTC)
  • 29-07-2017 09:53:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9520, 12.7770 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Tivoli RM 2 56533 56533
Guidonia Montecelio RM 7 88673 145206
Castel Madama RM 8 7399 152605
Marcellina RM 8 7280 159885
San Polo dei Cavalieri RM 9 2992 162877
San Gregorio da Sassola RM 9 1619 164496
Gallicano nel Lazio RM 10 6334 170830
Casape RM 10 744 171574
Sant'Angelo Romano RM 11 5018 176592
Vicovaro RM 12 4019 180611
Poli RM 12 2418 183029
Palombara Sabina RM 13 13269 196298
Colonna RM 13 4287 200585
Zagarolo RM 13 17843 218428
Ciciliano RM 14 1336 219764
Sambuci RM 14 925 220689
Fonte Nuova RM 14 32562 253251
San Cesareo RM 15 15153 268404
Mentana RM 15 22921 291325
Roccagiovine RM 15 263 291588
Castel San Pietro Romano RM 15 902 292490
Mandela RM 15 917 293407
Palestrina RM 16 21672 315079
Saracinesco RM 16 185 315264
Monte Porzio Catone RM 16 8693 323957
Pisoniano RM 16 770 324727
Monte Compatri RM 16 11978 336705
Cerreto Laziale RM 17 1118 337823
Licenza RM 17 1011 338834
Monterotondo RM 17 40830 379664
Rocca Priora RM 17 11962 391626
Capranica Prenestina RM 18 351 391977
Frascati RM 18 22087 414064
Gerano RM 18 1263 415327
Rocca di Cave RM 18 377 415704
Monteflavio RM 18 1348 417052
Moricone RM 18 2650 419702
San Vito Romano RM 19 3273 422975
Anticoli Corrado RM 19 915 423890
Cineto Romano RM 19 601 424491
Percile RM 20 255 424746
Cave RM 20 11287 436033
Roviano RM 20 1351 437384

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km SW of Tivoli (56533 inhabitants)
7 Km SE of Guidonia Montecelio (88673 inhabitants)
25 Km E of Roma (2864731 inhabitants)
29 Km N of Velletri (53303 inhabitants)
39 Km NE of Pomezia (62966 inhabitants)
41 Km N of Aprilia (73446 inhabitants)
49 Km E of Fiumicino (78395 inhabitants)
55 Km N of Latina (125985 inhabitants)
57 Km N of Anzio (54211 inhabitants)
68 Km SW of L'Aquila (69753 inhabitants)
69 Km S of Terni (111501 inhabitants)
76 Km SE of Viterbo (67173 inhabitants)
83 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 1.0
ML 0.5 		2017-07-29
07:53:44		 41.9518 12.7772 8 2018-07-06
12:40:14		 Bollettino Sismico Italiano INGV 48607101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-07-29 07:53:44 ± 0.36
Latitude 41.9518 ± 0.0063
Longitude 12.7772 ± 0.0085
Depth (km) 8 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 48607101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 680
Semi-minor axis of confidence ellipse (meter) 526
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.20145
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:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 48607101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-08-02 12:15:50

Md:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 2
Type of magnitude Md
Reference to an origin 48607101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-08-02 12:15:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2017-07-29T07:54:09.48 3.0 undecidable manual P 0.54 0
IV.VIVA.HHZ. 2017-07-29T07:53:52.21 0.3 undecidable manual S 181 22.3554 110 -0.12 72
IV.CERT.HHZ. 2017-07-29T07:53:50.64 0.3 undecidable manual S 91 16.872 115 0.07 74
IV.VIVA.HHZ. 2017-07-29T07:53:49.19 0.6 undecidable manual P 181 22.3554 110 0.34 46
IV.T1214.EHZ. 2017-07-29T07:53:49.56 3.0 undecidable manual P -2.29 0
IV.MTCE.HHZ. 2017-07-29T07:53:48.15 0.3 undecidable manual S 340 8.3805 134 0.05 75
IV.ARRO.EHZ. 2017-07-29T07:53:47.47 3.0 undecidable manual P 0.1 0
IV.CERT.HHZ. 2017-07-29T07:53:47.74 0.1 undecidable manual P 91 16.872 115 -0.09 98
IV.MTCE.HHZ. 2017-07-29T07:53:46.34 0.1 negative manual P 340 8.3805 134 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERT.HHN. ML:0.2 0.000017413564000000004 0.1216 AML other m 2017-07-29T07:53:51.58
IV.CERT.HHE. ML:0.4 0.000027317994999999998 0.1408 AML other m 2017-07-29T07:53:52.36
IV.MTCE.HHE. ML:0.8 0.0001026 0.24 AML other m 2017-07-29T07:53:48.32
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