Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 07-07-2019 and time 21:44:20 (Italy) in region 4 km NE Colonna (RM)

A magnitude ML 1.6 earthquake occured in region: 4 km NE Colonna (RM), on

  • 07-07-2019 19:44:20 (UTC)
  • 07-07-2019 21:44:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8640, 12.7740 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.

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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
Colonna RM 4 4287 4287
Gallicano nel Lazio RM 4 6334 10621
San Cesareo RM 5 15153 25774
Zagarolo RM 5 17843 43617
Monte Compatri RM 7 11978 55595
Monte Porzio Catone RM 7 8693 64288
Rocca Priora RM 8 11962 76250
Frascati RM 10 22087 98337
Palestrina RM 10 21672 120009
Poli RM 10 2418 122427
Castel San Pietro Romano RM 10 902 123329
San Gregorio da Sassola RM 10 1619 124948
Casape RM 11 744 125692
Tivoli RM 11 56533 182225
Grottaferrata RM 12 20327 202552
Rocca di Papa RM 13 17034 219586
Labico RM 13 6379 225965
Marino RM 14 43026 268991
Cave RM 14 11287 280278
Rocca di Cave RM 14 377 280655
Castel Madama RM 15 7399 288054
Capranica Prenestina RM 15 351 288405
Valmontone RM 15 15959 304364
Ciampino RM 16 38412 342776
Guidonia Montecelio RM 16 88673 431449
Lariano RM 16 13432 444881
Pisoniano RM 16 770 445651
Castel Gandolfo RM 17 8997 454648
Nemi RM 17 1943 456591
Genazzano RM 17 6036 462627
San Polo dei Cavalieri RM 18 2992 465619
San Vito Romano RM 18 3273 468892
Ciciliano RM 18 1336 470228
Albano Laziale RM 18 41715 511943
Ariccia RM 18 19407 531350
Marcellina RM 18 7280 538630
Artena RM 18 14276 552906
Genzano di Roma RM 19 23970 576876
Sambuci RM 19 925 577801
Vicovaro RM 20 4019 581820
Cerreto Laziale RM 20 1118 582938
Fonte Nuova RM 20 32562 615500
Sant'Angelo Romano RM 20 5018 620518
Velletri RM 20 53303 673821
Gerano RM 20 1263 675084

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Tivoli (56533 inhabitants)
16 Km S of Guidonia Montecelio (88673 inhabitants)
20 Km N of Velletri (53303 inhabitants)
24 Km E of Roma (2864731 inhabitants)
31 Km NE of Pomezia (62966 inhabitants)
32 Km NE of Aprilia (73446 inhabitants)
45 Km N of Latina (125985 inhabitants)
46 Km E of Fiumicino (78395 inhabitants)
48 Km N of Anzio (54211 inhabitants)
75 Km SW of L'Aquila (69753 inhabitants)
78 Km S of Terni (111501 inhabitants)
83 Km SE of Viterbo (67173 inhabitants)
85 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 		ML 1.6 2019-07-07
19:44:20		 41.8643 12.7738 10 2019-11-13
14:30:53		 Bollettino Sismico Italiano INGV 70370641
Reviewed
Rev100 		ML 1.7 2019-07-07
19:44:20		 41.8663 12.7717 10 2019-07-07
19:50:56		 Sala Sismica INGV-Roma 70339821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-07 19:44:20 ± 0.04
Latitude 41.8643 ± 0.0027
Longitude 12.7738 ± 0.0036
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 70370641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.65920
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.5
Num. used stations 18
Type of magnitude ML
Reference to an origin 70370641
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-07-08 12:12:06

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 70339821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-07 19:50:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BARO.HNZ. 2019-07-07T19:44:42.68 1.0 undecidable manual S 306 73.1712 50 0.18 22
IV.TOLF.HHN. 2019-07-07T19:44:41.17 1.0 undecidable manual S 289 67.5768 50 0.17 22
IV.GIUL.HHZ. 2019-07-07T19:44:37.15 0.6 undecidable manual S 130 52.3032 50 0.21 45
IV.FIAM.HHZ. 2019-07-07T19:44:37.37 0.6 undecidable manual S 32 53.0025 50 0.26 44
IV.PTQR.HHZ. 2019-07-07T19:44:37.92 0.6 undecidable manual S 71 54.6009 50 0.38 43
IV.SRES.HHN. 2019-07-07T19:44:35.21 1.0 undecidable manual S 332 46.7199 50 -0.22 23
IV.GUAR.HNN. 2019-07-07T19:44:34.84 0.3 undecidable manual S 100 45.2214 50 -0.18 69
IT.MMP1.HGE. 2019-07-07T19:44:34.60 0.6 undecidable manual S 357 42.7239 50 0.22 46
IV.LATB.EHZ. 2019-07-07T19:44:34.54 0.6 undecidable manual S 159 43.9227 50 -0.16 46
IV.BARO.HNZ. 2019-07-07T19:44:33.06 0.3 undecidable manual P 306 73.1712 50 -0.04 67
IT.CSO1.HGZ. 2019-07-07T19:44:32.99 0.3 undecidable manual S 45 36.8298 50 0.18 70
IV.TOLF.HHN. 2019-07-07T19:44:32.59 0.3 undecidable manual P 289 67.5768 50 0.36 63
IV.PTQR.HHZ. 2019-07-07T19:44:29.93 0.1 undecidable manual P 71 54.6009 50 -0.31 88
IV.GIUL.HHZ. 2019-07-07T19:44:29.65 0.1 undecidable manual P 130 52.3032 50 -0.24 89
IV.FIAM.HHZ. 2019-07-07T19:44:29.97 0.1 undecidable manual P 32 53.0025 50 -0.02 93
IV.LATB.EHZ. 2019-07-07T19:44:28.32 0.1 undecidable manual P 159 43.9227 50 -0.28 90
IV.GUAR.HNN. 2019-07-07T19:44:28.38 0.6 undecidable manual P 100 45.2214 50 -0.4 44
IT.MMP1.HGE. 2019-07-07T19:44:28.60 1.0 undecidable manual P 357 42.7239 50 0.19 23
IV.LAV9.HNZ. 2019-07-07T19:44:28.80 0.6 undecidable manual S 197 21.5673 115 0.29 47
IV.SRES.HHN. 2019-07-07T19:44:28.99 0.3 undecidable manual P 332 46.7199 50 -0.03 71
IV.SAMA.EHE. 2019-07-07T19:44:27.05 0.3 undecidable manual S 238 17.6712 119 -0.24 71
IV.MTCE.HHZ. 2019-07-07T19:44:27.14 0.3 undecidable manual S 352 17.7711 119 -0.18 72
IV.CERT.HHZ. 2019-07-07T19:44:27.63 0.3 undecidable manual S 61 19.5693 117 -0.24 71
IT.CSO1.HGZ. 2019-07-07T19:44:27.32 0.6 undecidable manual P 45 36.8298 50 -0.19 46
IV.MA9.HHN. 2019-07-07T19:44:26.11 0.3 undecidable manual S 222 14.1747 125 -0.15 73
IV.RDP.HHZ. 2019-07-07T19:44:26.00 0.3 undecidable manual S 204 12.6762 128 0.15 73
IV.RCAV.EHZ. 2019-07-07T19:44:26.47 0.3 undecidable manual S 98 14.2746 125 0.17 73
IV.LAV9.HNZ. 2019-07-07T19:44:25.20 0.6 undecidable manual P 197 21.5673 115 0.18 48
IV.VIVA.HHZ. 2019-07-07T19:44:25.93 0.6 undecidable manual S 181 12.6762 128 0.09 49
IV.RMP.HHZ. 2019-07-07T19:44:24.40 0.3 undecidable manual S 225 8.3805 140 -0.37 70
IV.SAMA.EHE. 2019-07-07T19:44:24.18 0.1 undecidable manual P 238 17.6712 119 -0.14 97
IV.MTCE.HHZ. 2019-07-07T19:44:24.35 0.1 negative manual P 352 17.7711 119 0.01 99
IV.CERT.HHZ. 2019-07-07T19:44:24.67 0.1 negative manual P 61 19.5693 117 0.02 99
IV.RCAV.EHZ. 2019-07-07T19:44:23.89 0.1 undecidable manual P 98 14.2746 125 0.14 97
IV.MA9.HHN. 2019-07-07T19:44:23.45 1.0 undecidable manual P 222 14.1747 125 -0.27 24
IV.RDP.HHZ. 2019-07-07T19:44:23.78 0.1 positive manual P 204 12.6762 128 0.3 95
IV.VIVA.HHZ. 2019-07-07T19:44:23.80 0.1 undecidable manual P 181 12.6762 128 0.31 94
IV.RMP.HHZ. 2019-07-07T19:44:22.92 0.1 positive manual P 225 8.3805 140 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RCAV.EHE. ML:1.6 0.0003625 1.32 AML other m 2019-07-07T19:44:29.96
IV.RMP.HHN. ML:2.3 0.00276 1.36 AML other m 2019-07-07T19:44:25.21
IV.VIVA.HHN. ML:2.2 0.0018599999999999999 1.62 AML other m 2019-07-07T19:44:27.84
IV.RDP.HHE. ML:2.2 0.00181 0.28 AML other m 2019-07-07T19:44:27.47
IV.RCAV.EHN. ML:1.7 0.00045799999999999997 0.36 AML other m 2019-07-07T19:44:27.65
IV.MTCE.HHN. ML:1.4 0.0002215 0.34 AML other m 2019-07-07T19:44:27.96
IV.MTCE.HHE. ML:1.3 0.00015900000000000002 0.28 AML other m 2019-07-07T19:44:27.81
IV.CERT.HHN. ML:1.6 0.000322 0.48 AML other m 2019-07-07T19:44:28.59
IV.RDP.HHN. ML:2.2 0.0019399999999999999 0.34 AML other m 2019-07-07T19:44:28.61
IV.CERT.HHE. ML:1.8 0.00047450000000000004 0.22 AML other m 2019-07-07T19:44:29.03
IV.VIVA.HHE. ML:2.3 0.0020350000000000004 0.28 AML other m 2019-07-07T19:44:29.67
IV.GIUL.HHN. ML:1.3 0.00005035 0.42 AML other m 2019-07-07T19:44:40.35
IV.GIUL.HHE. ML:1.4 0.000058750000000000005 0.62 AML other m 2019-07-07T19:44:40.63
IV.FIAM.HHN. ML:1.0 0.0000262 1.34 AML other m 2019-07-07T19:44:42.87
IV.FIAM.HHE. ML:0.9 0.000021400000000000002 0.46 AML other m 2019-07-07T19:44:44.62
IV.LATB.EHE. ML:0.9 0.00002433903 0.4096 AML other m 2019-07-07T19:44:36.51
IV.LATB.EHN. ML:0.7 0.0000169817425 0.4224 AML other m 2019-07-07T19:44:36.19
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