Earthquake with magnitude of ML 1.5 on date 20-09-2019 and time 21:55:00 (Italy) in region 5 km W Gallicano nel Lazio (RM)

A magnitude ML 1.5 earthquake occured in region: 5 km W Gallicano nel Lazio (RM), on

  • 20-09-2019 19:55:00 (UTC)
  • 20-09-2019 21:55:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.88, 12.77 at 8 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
Gallicano nel Lazio RM 5 6334 6334
Colonna RM 5 4287 10621
Zagarolo RM 7 17843 28464
San Cesareo RM 7 15153 43617
Monte Porzio Catone RM 8 8693 52310
Monte Compatri RM 9 11978 64288
Tivoli RM 10 56533 120821
Rocca Priora RM 10 11962 132783
San Gregorio da Sassola RM 10 1619 134402
Casape RM 10 744 135146
Poli RM 11 2418 137564
Frascati RM 11 22087 159651
Palestrina RM 11 21672 181323
Castel San Pietro Romano RM 11 902 182225
Grottaferrata RM 13 20327 202552
Castel Madama RM 14 7399 209951
Guidonia Montecelio RM 14 88673 298624
Rocca di Papa RM 14 17034 315658
Labico RM 15 6379 322037
Marino RM 15 43026 365063
Rocca di Cave RM 16 377 365440
Cave RM 16 11287 376727
Capranica Prenestina RM 16 351 377078
San Polo dei Cavalieri RM 16 2992 380070
Marcellina RM 16 7280 387350
Ciampino RM 16 38412 425762
Pisoniano RM 16 770 426532
Ciciliano RM 17 1336 427868
Valmontone RM 17 15959 443827
Sant'Angelo Romano RM 18 5018 448845
Fonte Nuova RM 18 32562 481407
Castel Gandolfo RM 18 8997 490404
Lariano RM 18 13432 503836
Genazzano RM 18 6036 509872
San Vito Romano RM 18 3273 513145
Vicovaro RM 18 4019 517164
Sambuci RM 18 925 518089
Nemi RM 18 1943 520032
Albano Laziale RM 19 41715 561747
Cerreto Laziale RM 19 1118 562865
Ariccia RM 20 19407 582272
Gerano RM 20 1263 583535
Mentana RM 20 22921 606456

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km S of Tivoli (56533 inhabitants)
14 Km S of Guidonia Montecelio (88673 inhabitants)
22 Km N of Velletri (53303 inhabitants)
23 Km E of Roma (2864731 inhabitants)
32 Km NE of Pomezia (62966 inhabitants)
33 Km N of Aprilia (73446 inhabitants)
45 Km E of Fiumicino (78395 inhabitants)
48 Km N of Latina (125985 inhabitants)
50 Km N of Anzio (54211 inhabitants)
74 Km SW of L'Aquila (69753 inhabitants)
76 Km S of Terni (111501 inhabitants)
81 Km SE of Viterbo (67173 inhabitants)
84 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 1.5 2019-09-20
19:55:00
41.88 12.77 8 2019-09-20
20:10:27
Sala Sismica INGV-Roma 72594511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-20 19:55:00 ± 0.11
Latitude 41.88 ± 0.01
Longitude 12.77 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72594511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 731
Semi-minor axis of confidence ellipse (meter) 494
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 730
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
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
Epicentral distance of station farthest from the epicenter (degree) 0.46495
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 72594511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-20 20:10:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LRP.EHZ. 2019-09-20T19:55:11.73 3.0 undecidable manual P -2.98 0
IV.FIAM.HHE. 2019-09-20T19:55:09.51 0.3 undecidable manual P 34 0.4649 50 -0.37 65
IV.SRES.HHE. 2019-09-20T19:55:08.92 0.3 undecidable manual P 332 0.402 50 0.12 70
IV.RCAV.EHZ. 2019-09-20T19:55:06.00 0.6 undecidable manual S 105 0.1385 116 0 50
IV.MTCE.HHZ. 2019-09-20T19:55:06.29 1.0 undecidable manual S 353 0.1412 116 0.18 24
IV.CERT.HHZ. 2019-09-20T19:55:04.13 0.6 negative manual P 67 0.1736 112 -0.08 49
IV.VIVA.HHZ. 2019-09-20T19:55:03.53 0.1 undecidable manual P 179 0.1322 117 0.15 97
IV.RDP.HHZ. 2019-09-20T19:55:03.66 0.1 undecidable manual P 199 0.1286 118 0.34 93
IV.RMP.HHZ. 2019-09-20T19:55:03.70 0.6 undecidable manual S 214 0.0854 129 -0.59 44
IV.RCAV.EHZ. 2019-09-20T19:55:03.50 0.1 undecidable manual P 105 0.1385 116 0.01 100
IV.MTCE.HHZ. 2019-09-20T19:55:03.62 0.1 undecidable manual P 353 0.1412 116 0.06 99
IV.RMP.HHZ. 2019-09-20T19:55:02.34 0.1 undecidable manual P 214 0.0854 129 -0.16 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHN. ML:2 0.001545 0.2 AML other m 2019-09-20T19:55:04.01
IV.RMP.HHE. ML:1.8 0.0010165 0.28 AML other m 2019-09-20T19:55:05.84
IV.VIVA.HHN. ML:1.8 0.0007515 0.42 AML other m 2019-09-20T19:55:06.42
IV.RDP.HHN. ML:1.7 0.000646 0.66 AML other m 2019-09-20T19:55:06.87
IV.MTCE.HHN. ML:1.2 0.0001425 0.36 AML other m 2019-09-20T19:55:07.24
IV.RCAV.EHE. ML:1.1 0.000124 1.2 AML other m 2019-09-20T19:55:07.66
IV.MTCE.HHE. ML:1.2 0.0001675 1.72 AML other m 2019-09-20T19:55:07.11
IV.CERT.HHN. ML:1.2 0.0001185 0.12 AML other m 2019-09-20T19:55:07.93
IV.RDP.HHE. ML:1.8 0.000683 0.4 AML other m 2019-09-20T19:55:08.29
IV.CERT.HHE. ML:1.2 0.000143 1.28 AML other m 2019-09-20T19:55:08.07
IV.RCAV.EHN. ML:1 0.000116 0.34 AML other m 2019-09-20T19:55:09.07
IV.VIVA.HHE. ML:1.9 0.0009175 1.76 AML other m 2019-09-20T19:55:09.97
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