Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 05-07-2023 and time 21:34:49 (Italy) in region 2 km W Ciciliano (RM)

A magnitude ML 1.5 earthquake occured in region: 2 km W Ciciliano (RM), on

  • 05-07-2023 19:34:49 (UTC)
  • 05-07-2023 21:34:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9540, 12.9160 at 9 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.

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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
Ciciliano RM 2 1336 1336
Sambuci RM 4 925 2261
Castel Madama RM 5 7399 9660
San Gregorio da Sassola RM 5 1619 11279
Cerreto Laziale RM 6 1118 12397
Casape RM 6 744 13141
Pisoniano RM 6 770 13911
Saracinesco RM 7 185 14096
Gerano RM 7 1263 15359
Vicovaro RM 7 4019 19378
Poli RM 8 2418 21796
Anticoli Corrado RM 9 915 22711
Mandela RM 9 917 23628
Rocca Canterano RM 9 196 23824
San Polo dei Cavalieri RM 9 2992 26816
San Vito Romano RM 10 3273 30089
Marano Equo RM 10 779 30868
Tivoli RM 10 56533 87401
Rocca Santo Stefano RM 10 975 88376
Agosta RM 10 1765 90141
Canterano RM 10 351 90492
Roviano RM 11 1351 91843
Capranica Prenestina RM 11 351 92194
Roccagiovine RM 11 263 92457
Cineto Romano RM 12 601 93058
Marcellina RM 12 7280 100338
Gallicano nel Lazio RM 12 6334 106672
Castel San Pietro Romano RM 12 902 107574
Rocca di Cave RM 12 377 107951
Bellegra RM 12 2887 110838
Palestrina RM 13 21672 132510
Arsoli RM 13 1586 134096
Cervara di Roma RM 13 455 134551
Licenza RM 14 1011 135562
Riofreddo RM 14 781 136343
Olevano Romano RM 14 6687 143030
Genazzano RM 14 6036 149066
Zagarolo RM 14 17843 166909
Oricola AQ 15 1244 168153
Rocca di Botte AQ 15 856 169009
Cave RM 15 11287 180296
Roiate RM 15 737 181033
Subiaco RM 16 9074 190107
Percile RM 16 255 190362
Vallinfreda RM 16 283 190645
Guidonia Montecelio RM 16 88673 279318
Affile RM 17 1548 280866
San Cesareo RM 17 15153 296019
Camerata Nuova RM 18 447 296466
Palombara Sabina RM 18 13269 309735
Vivaro Romano RM 18 182 309917
Arcinazzo Romano RM 18 1348 311265
Labico RM 19 6379 317644
Monteflavio RM 19 1348 318992
Colonna RM 19 4287 323279
Sant'Angelo Romano RM 19 5018 328297
Pereto AQ 19 682 328979
Serrone FR 20 3099 332078
Valmontone RM 20 15959 348037
Orvinio RI 20 405 348442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km E of Tivoli (56533 inhabitants)
16 Km E of Guidonia Montecelio (88673 inhabitants)
32 Km NE of Velletri (53303 inhabitants)
36 Km E of Roma (2864731 inhabitants)
46 Km NE of Aprilia (73446 inhabitants)
47 Km NE of Pomezia (62966 inhabitants)
54 Km N of Latina (125985 inhabitants)
60 Km E of Fiumicino (78395 inhabitants)
60 Km SW of L'Aquila (69753 inhabitants)
61 Km NE of Anzio (54211 inhabitants)
71 Km SE of Terni (111501 inhabitants)
84 Km SE of Viterbo (67173 inhabitants)
94 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
Reviewed
Rev100 		ML 1.5 2023-07-05
19:34:49		 41.954 12.9158 9 2023-07-05
19:46:50		 Sala Sismica INGV-Roma 118999551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-05 19:34:49 ± 0.1
Latitude 41.9540 ± 0.0063
Longitude 12.9158 ± 0.0097
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 118999551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 918
Semi-minor axis of confidence ellipse (meter) 530
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 230
Circular confidence region, given by single value of horizontal uncertainty (meter) 920.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.63852
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 118999551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-05 19:46:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.POFI.HHZ. 2023-07-05T19:35:12.02 0.6 undecidable manual S 111 70.8735 50 0.43 43
IV.MMP1.HGZ. 2023-07-05T19:35:08.76 0.1 undecidable manual P 100
IV.GIUL.HHZ. 2023-07-05T19:35:07.00 0.6 undecidable manual S 147 52.1034 50 0.41 45
IV.FRON.EHZ. 2023-07-05T19:35:05.32 3.0 positive manual P 0.31 0
IV.CAFI.HHZ. 2023-07-05T19:35:05.94 3.0 undecidable manual P 0.04 0
IV.FDMO.HHZ. 2023-07-05T19:35:05.40 3.0 undecidable manual S -1.06 0
IV.POFI.HHZ. 2023-07-05T19:35:01.91 0.6 positive manual P 111 70.8735 50 -0.46 43
IV.GIUL.HHZ. 2023-07-05T19:34:59.20 0.6 negative manual P 147 52.1034 50 -0.27 46
IV.FIAM.HNN. 2023-07-05T19:34:57.39 0.1 undecidable manual P 25 38.5281 50 0 100
IV.PTQR.HHN. 2023-07-05T19:34:57.52 0.1 undecidable manual P 79 40.626 50 -0.19 96
IV.MTCE.HHZ. 2023-07-05T19:34:56.20 0.6 undecidable manual S 298 16.2726 119 0.03 52
IV.RCAV.EHZ. 2023-07-05T19:34:54.72 0.6 undecidable manual S 168 12.0768 126 -0.24 50
IV.MTCE.HHZ. 2023-07-05T19:34:53.62 0.6 undecidable manual P 298 16.2726 119 0.16 50
IV.CERT.HHZ. 2023-07-05T19:34:53.38 0.6 undecidable manual S 96 5.4945 148 0.01 53
IV.RCAV.EHZ. 2023-07-05T19:34:52.82 1.0 undecidable manual P 168 12.0768 126 0.06 26
IV.CERT.HHZ. 2023-07-05T19:34:52.06 0.3 negative manual P 96 5.4945 148 0.22 76
IV.LNSS.HHZ. 2023-07-05T19:34:49.01 3.0 undecidable manual P 0.68 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERT.HHE. ML:1.4 0.0005035 0.52 AML other m 2023-07-05T19:34:53.45
IV.CERT.HNE. ML:1.8 0.0011445000000000001 1.42 AML other m 2023-07-05T19:34:53.10
IV.CERT.HNN. ML:1.8 0.0011085000000000001 0.74 AML other m 2023-07-05T19:34:53.60
IV.CERT.HHN. ML:1.8 0.0011125 0.76 AML other m 2023-07-05T19:34:53.60
IV.RCAV.EHN. ML:1.4 0.000324 0.64 AML other m 2023-07-05T19:34:55.49
IV.RCAV.EHE. ML:1.4 0.00027350000000000003 0.3 AML other m 2023-07-05T19:34:56.48
IV.GIUL.HHN. ML:1.2 0.00003705 1.42 AML other m 2023-07-05T19:35:07.18
IV.GIUL.HHE. ML:1.1 0.0000285 0.62 AML other m 2023-07-05T19:35:08.27
IV.GIUL.HNE. ML:1.6 0.00010565045000000001 1.1648 AML other m 2023-07-05T19:35:07.70
IV.GIUL.HNN. ML:1.5 0.000083742485 1.8304 AML other m 2023-07-05T19:35:07.64
IV.POFI.HNE. ML:1.7 0.00008448069499999999 0.6144 AML other m 2023-07-05T19:35:13.56
IV.POFI.HNN. ML:1.9 0.0001390092 4.608 AML other m 2023-07-05T19:35:14.50
IV.POFI.HHE. ML:0.8 0.000011721539500000001 0.2816 AML other m 2023-07-05T19:35:12.28
IV.POFI.HHN. ML:0.8 0.000009361975499999999 0.3456 AML other m 2023-07-05T19:35:13.86
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