Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 26-07-2020 and time 02:12:25 (Italy) in region 4 km NW Colonna (RM)

A magnitude ML 1.4 earthquake occured in region: 4 km NW Colonna (RM), on

  • 26-07-2020 00:12:25 (UTC)
  • 26-07-2020 02:12:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8600, 12.7210 at 11 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Monte Porzio Catone RM 5 8693 12980
Monte Compatri RM 6 11978 24958
Frascati RM 7 22087 47045
San Cesareo RM 8 15153 62198
Rocca Priora RM 8 11962 74160
Gallicano nel Lazio RM 9 6334 80494
Grottaferrata RM 9 20327 100821
Zagarolo RM 9 17843 118664
Rocca di Papa RM 11 17034 135698
Marino RM 11 43026 178724
Ciampino RM 12 38412 217136
Tivoli RM 13 56533 273669
Castel Gandolfo RM 14 8997 282666
San Gregorio da Sassola RM 14 1619 284285
Palestrina RM 14 21672 305957
Castel San Pietro Romano RM 15 902 306859
Casape RM 15 744 307603
Poli RM 15 2418 310021
Albano Laziale RM 15 41715 351736
Nemi RM 16 1943 353679
Guidonia Montecelio RM 16 88673 442352
Labico RM 16 6379 448731
Ariccia RM 16 19407 468138
Genzano di Roma RM 17 23970 492108
Fonte Nuova RM 17 32562 524670
Lariano RM 17 13432 538102
Castel Madama RM 18 7399 545501
Cave RM 18 11287 556788
Rocca di Cave RM 19 377 557165
Valmontone RM 19 15959 573124
Capranica Prenestina RM 19 351 573475
Sant'Angelo Romano RM 19 5018 578493
Marcellina RM 20 7280 585773
San Polo dei Cavalieri RM 20 2992 588765
Velletri RM 20 53303 642068
Roma RM 20 2864731 3506799
Lanuvio RM 20 13632 3520431

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Tivoli (56533 inhabitants)
16 Km S of Guidonia Montecelio (88673 inhabitants)
20 Km N of Velletri (53303 inhabitants)
20 Km E of Roma (2864731 inhabitants)
28 Km NE of Pomezia (62966 inhabitants)
30 Km N of Aprilia (73446 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
46 Km NW of Latina (125985 inhabitants)
46 Km N of Anzio (54211 inhabitants)
78 Km S of Terni (111501 inhabitants)
78 Km SW of L'Aquila (69753 inhabitants)
80 Km SE of Viterbo (67173 inhabitants)
81 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 1.4 2020-07-26
00:12:25		 41.8605 12.7207 11 2020-11-19
12:36:55		 Bollettino Sismico Italiano INGV 81447041
Reviewed
Rev100 		ML 1.4 2020-07-26
00:12:25		 41.8668 12.7222 11 2020-07-26
00:22:21		 Sala Sismica INGV-Roma 81348051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-26 00:12:25 ± 0.05
Latitude 41.8605 ± 0.0027
Longitude 12.7207 ± 0.0048
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81447041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 356
Semi-minor axis of confidence ellipse (meter) 315
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 226
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 38
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
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) 0.05036
Epicentral distance of station farthest from the epicenter (degree) 0.67989
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:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 81447041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-29 09:29:40

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 81348051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-26 00:22:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTQR.HHZ. 2020-07-26T00:12:43.53 0.6 undecidable manual S 72 58.8966 50 0.05 47
IV.FIAM.HNN. 2020-07-26T00:12:42.83 0.6 undecidable manual S 36 55.7997 50 0.18 46
IV.GIUL.HHZ. 2020-07-26T00:12:42.37 0.6 undecidable manual S 127 55.5 50 -0.2 45
IV.GUAR.HNN. 2020-07-26T00:12:41.14 0.6 undecidable manual S 98 49.4172 50 0.18 46
IV.LATB.EHZ. 2020-07-26T00:12:39.49 0.6 undecidable manual S 154 45.3213 50 -0.37 45
IV.SRES.HHZ. 2020-07-26T00:12:39.75 0.6 undecidable manual S 337 45.2214 50 -0.08 47
IT.CSO1.HGE. 2020-07-26T00:12:39.26 0.6 undecidable manual S 49 40.3263 50 0.73 40
IV.LRP.EHZ. 2020-07-26T00:12:38.17 0.3 undecidable manual P 108 75.4689 50 -0.16 66
IV.VVLD.HHZ. 2020-07-26T00:12:37.86 0.3 undecidable manual P 89 74.5698 50 -0.33 64
IV.PTQR.HHZ. 2020-07-26T00:12:35.73 0.1 undecidable manual P 72 58.8966 50 -0.04 93
IV.FIAM.HNN. 2020-07-26T00:12:35.21 0.3 undecidable manual P 36 55.7997 50 -0.08 70
IV.GIUL.HHZ. 2020-07-26T00:12:35.24 0.1 undecidable manual P 127 55.5 50 -0.01 95
IV.GUAR.HNN. 2020-07-26T00:12:34.67 0.6 undecidable manual P 98 49.4172 50 0.35 45
IV.SRES.HHZ. 2020-07-26T00:12:33.64 0.6 undecidable manual P 337 45.2214 50 -0.03 48
IT.CSO1.HGE. 2020-07-26T00:12:33.05 0.3 undecidable manual P 49 40.3263 50 0.13 71
IT.RMVT.HGE. 2020-07-26T00:12:33.73 0.3 undecidable manual S 299 22.0668 50 0.07 74
IV.LATB.EHZ. 2020-07-26T00:12:33.40 0.1 positive manual P 154 45.3213 50 -0.28 91
IV.MTCE.HHZ. 2020-07-26T00:12:32.15 0.3 undecidable manual S 6 18.0708 121 -0.41 70
IV.RCAV.EHE. 2020-07-26T00:12:32.71 0.6 undecidable manual S 94 18.6702 120 -0.01 51
IV.VIVA.HHZ. 2020-07-26T00:12:31.27 0.3 undecidable manual S 161 12.876 130 0.18 74
IV.RDP.HHZ. 2020-07-26T00:12:30.59 0.6 undecidable manual S 184 11.1777 134 -0.04 51
IT.RMMM.HGE. 2020-07-26T00:12:30.42 0.6 undecidable manual P 288 23.1546 50 0.15 49
IV.MA9.HHN. 2020-07-26T00:12:30.33 0.6 undecidable manual S 207 11.2776 134 -0.34 48
IT.RMVT.HGE. 2020-07-26T00:12:30.10 0.3 undecidable manual P 299 22.0668 50 0 75
IV.MTCE.HHZ. 2020-07-26T00:12:29.33 0.1 undecidable manual P 6 18.0708 121 -0.14 99
IV.RCAV.EHE. 2020-07-26T00:12:29.49 0.6 undecidable manual P 94 18.6702 120 -0.07 50
IV.RMP.HHZ. 2020-07-26T00:12:29.47 0.3 undecidable manual S 194 5.5944 153 0.01 78
IV.ROM9.HNZ. 2020-07-26T00:12:29.79 0.3 undecidable manual P 258 17.3715 122 0.45 69
IV.MA9.HHN. 2020-07-26T00:12:28.20 0.3 undecidable manual P 207 11.2776 134 -0.18 74
IV.RDP.HHZ. 2020-07-26T00:12:28.66 0.6 undecidable manual P 184 11.1777 134 0.3 48
IV.VIVA.HHZ. 2020-07-26T00:12:28.97 0.1 undecidable manual P 161 12.876 130 0.35 95
IV.SAMA.EHZ. 2020-07-26T00:12:28.51 0.3 undecidable manual P 230 13.875 128 -0.25 73
IV.RMP.HHZ. 2020-07-26T00:12:27.85 0.1 undecidable manual P 194 5.5944 153 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHN. ML:2.2 0.0023101235 0.1 AML other m 2020-07-26T00:12:29.90
IV.RMP.HHE. ML:2.0 0.001476681 0.12 AML other m 2020-07-26T00:12:29.84
IV.RDP.HHN. ML:1.6 0.00044408965 0.22 AML other m 2020-07-26T00:12:35.70
IV.RDP.HHE. ML:1.4 0.00028995910000000004 0.38 AML other m 2020-07-26T00:12:36.71
IV.VIVA.HHE. ML:2.0 0.00095004445 0.28 AML other m 2020-07-26T00:12:33.57
IV.VIVA.HHN. ML:1.9 0.0008644455 1.66 AML other m 2020-07-26T00:12:35.90
IV.MTCE.HHN. ML:1.1 0.00010959714 0.26 AML other m 2020-07-26T00:12:32.70
IV.MTCE.HHE. ML:1.3 0.00014801 0.42 AML other m 2020-07-26T00:12:32.55
IV.GIUL.HHN. ML:1.3 0.000051716200000000005 1.82 AML other m 2020-07-26T00:12:45.95
IV.VVLD.HHE. ML:1.2 0.000023373755 1.7 AML other m 2020-07-26T00:12:48.10
IV.VVLD.HHN. ML:1.1 0.000020545925 0.28 AML other m 2020-07-26T00:12:49.20
IV.GIUL.HHE. ML:1.0 0.000025303538 0.14 AML other m 2020-07-26T00:12:44.76
IV.LRP.EHE. ML:1.5 0.000047557335 0.2 AML other m 2020-07-26T00:12:50.50
IV.LRP.EHN. ML:0.8 0.000011718205 0.18 AML other m 2020-07-26T00:12:50.55
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