Earthquake with magnitude of ML 1.8 on date 09-07-2019 and time 01:11:24 (Italy) in region 4 km NE Colonna (RM)

A magnitude ML 1.8 earthquake occured in region: 4 km NE Colonna (RM), on

  • 08-07-2019 23:11:24 (UTC)
  • 09-07-2019 01:11:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.87, 12.78 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Colonna RM 4 4287 4287
Gallicano nel Lazio RM 4 6334 10621
Zagarolo RM 5 17843 28464
San Cesareo RM 5 15153 43617
Monte Compatri RM 7 11978 55595
Monte Porzio Catone RM 7 8693 64288
Rocca Priora RM 8 11962 76250
Palestrina RM 10 21672 97922
San Gregorio da Sassola RM 10 1619 99541
Frascati RM 10 22087 121628
Poli RM 10 2418 124046
Castel San Pietro Romano RM 10 902 124948
Casape RM 10 744 125692
Tivoli RM 11 56533 182225
Grottaferrata RM 12 20327 202552
Rocca di Papa RM 13 17034 219586
Labico RM 13 6379 225965
Cave RM 14 11287 237252
Marino RM 14 43026 280278
Rocca di Cave RM 14 377 280655
Castel Madama RM 15 7399 288054
Capranica Prenestina RM 15 351 288405
Guidonia Montecelio RM 16 88673 377078
Valmontone RM 16 15959 393037
Ciampino RM 16 38412 431449
Pisoniano RM 16 770 432219
Lariano RM 16 13432 445651
Castel Gandolfo RM 17 8997 454648
Nemi RM 17 1943 456591
Genazzano RM 17 6036 462627
San Polo dei Cavalieri RM 17 2992 465619
Ciciliano RM 18 1336 466955
San Vito Romano RM 18 3273 470228
Marcellina RM 18 7280 477508
Albano Laziale RM 18 41715 519223
Artena RM 18 14276 533499
Ariccia RM 18 19407 552906
Genzano di Roma RM 19 23970 576876
Sambuci RM 19 925 577801
Vicovaro RM 19 4019 581820
Cerreto Laziale RM 19 1118 582938
Sant'Angelo Romano RM 19 5018 587956
Fonte Nuova RM 19 32562 620518
Gerano RM 20 1263 621781
Velletri RM 20 53303 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)
46 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.8 2019-07-08
23:11:24
41.87 12.77 10 2019-07-08
23:19:21
Sala Sismica INGV-Roma 70386461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-08 23:11:24 ± 0.08
Latitude 41.87 ± 0.00
Longitude 12.77 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 70386461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 449
Semi-minor axis of confidence ellipse (meter) 428
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 284
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
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 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.60884
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 70386461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-08 23:19:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TOLF.HHE. 2019-07-08T23:11:37.44 0.6 undecidable manual P 289 0.6088 50 0.49 55
IV.FIAM.HHE. 2019-07-08T23:11:34.63 0.6 undecidable manual P 32 0.4748 50 -0.03 62
IV.GIUL.HHZ. 2019-07-08T23:11:34.32 0.3 undecidable manual P 131 0.4721 50 -0.29 88
IT.MMP1.HGE. 2019-07-08T23:11:33.51 0.3 undecidable manual P 357 0.3831 50 0.42 87
IV.SRES.HHE. 2019-07-08T23:11:33.75 1.0 undecidable manual P 332 0.4191 50 0.04 31
IV.LATB.EHZ. 2019-07-08T23:11:32.75 0.6 undecidable manual P 159 0.3975 50 -0.59 55
IV.CERT.HHZ. 2019-07-08T23:11:32.32 0.6 undecidable manual S 62 0.1745 117 -0.18 64
IV.MTCE.HHZ. 2019-07-08T23:11:31.84 0.6 undecidable manual S 351 0.1583 119 -0.09 65
IV.RCAV.EHZ. 2019-07-08T23:11:31.15 0.3 undecidable manual S 98 0.1286 125 0.19 96
IV.RDP.HHZ. 2019-07-08T23:11:31.06 0.3 undecidable manual S 204 0.116 127 0.49 91
IV.VIVA.HHZ. 2019-07-08T23:11:30.77 0.3 undecidable manual S 182 0.116 127 0.2 97
IV.MA9.HHZ. 2019-07-08T23:11:30.53 0.6 undecidable manual S 222 0.1295 124 -0.46 61
IV.RMP.HHZ. 2019-07-08T23:11:29.06 0.6 undecidable manual S 224 0.0773 139 -0.41 62
IV.CERT.HHZ. 2019-07-08T23:11:29.25 0.3 undecidable manual P 62 0.1745 117 -0.06 98
IV.VIVA.HHZ. 2019-07-08T23:11:28.40 0.3 undecidable manual P 182 0.116 127 0.2 97
IV.RCAV.EHZ. 2019-07-08T23:11:28.39 0.3 undecidable manual P 98 0.1286 125 -0.03 100
IV.RDP.HHZ. 2019-07-08T23:11:28.29 0.3 undecidable manual P 204 0.116 127 0.09 99
IV.MA9.HHZ. 2019-07-08T23:11:28.45 0.3 undecidable manual P 222 0.1295 124 0.02 100
IV.MTCE.HHZ. 2019-07-08T23:11:28.90 0.3 undecidable manual P 351 0.1583 119 -0.09 98
IV.SAMA.HHZ. 2019-07-08T23:11:28.77 0.3 undecidable manual P 238 0.161 119 -0.26 95
IV.RMP.HHZ. 2019-07-08T23:11:27.46 0.3 undecidable manual P 224 0.0773 139 -0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RDP.HHN. ML:1.9 0.0008645 1.58 AML other m 2019-07-08T23:11:33.79
IV.RMP.HHE. ML:1.7 0.00118 0.2 AML other m 2019-07-08T23:11:31.05
IV.RDP.HHE. ML:1.9 0.0008395 1.3 AML other m 2019-07-08T23:11:31.12
IV.VIVA.HHN. ML:2 0.001023 0.3 AML other m 2019-07-08T23:11:31.49
IV.VIVA.HHE. ML:2 0.0010175 0.34 AML other m 2019-07-08T23:11:32.41
IV.MTCE.HHE. ML:1.3 0.000153 0.26 AML other m 2019-07-08T23:11:32.39
IV.MTCE.HHN. ML:1.2 0.0001515 0.28 AML other m 2019-07-08T23:11:32.52
IV.CERT.HHE. ML:1.4 0.0002065 0.74 AML other m 2019-07-08T23:11:33.54
IV.CERT.HHN. ML:1.4 0.0001855 1.04 AML other m 2019-07-08T23:11:33.17
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download