Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 07-07-2023 and time 11:15:20 (Italy) in region 2 km SW Ciciliano (RM)

A magnitude ML 2.1 earthquake occured in region: 2 km SW Ciciliano (RM), on

  • 07-07-2023 09:15:20 (UTC)
  • 07-07-2023 11:15:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9550, 12.9260 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
Cerreto Laziale RM 5 1118 3379
Castel Madama RM 5 7399 10778
Pisoniano RM 6 770 11548
San Gregorio da Sassola RM 6 1619 13167
Saracinesco RM 6 185 13352
Gerano RM 6 1263 14615
Casape RM 6 744 15359
Vicovaro RM 7 4019 19378
Poli RM 8 2418 21796
Rocca Canterano RM 8 196 21992
Anticoli Corrado RM 8 915 22907
Mandela RM 9 917 23824
Marano Equo RM 9 779 24603
San Vito Romano RM 9 3273 27876
Canterano RM 9 351 28227
Agosta RM 9 1765 29992
Rocca Santo Stefano RM 10 975 30967
San Polo dei Cavalieri RM 10 2992 33959
Roviano RM 10 1351 35310
Capranica Prenestina RM 10 351 35661
Tivoli RM 11 56533 92194
Roccagiovine RM 11 263 92457
Cineto Romano RM 11 601 93058
Bellegra RM 12 2887 95945
Rocca di Cave RM 12 377 96322
Castel San Pietro Romano RM 12 902 97224
Marcellina RM 12 7280 104504
Cervara di Roma RM 12 455 104959
Arsoli RM 12 1586 106545
Gallicano nel Lazio RM 13 6334 112879
Palestrina RM 13 21672 134551
Licenza RM 14 1011 135562
Riofreddo RM 14 781 136343
Olevano Romano RM 14 6687 143030
Genazzano RM 14 6036 149066
Oricola AQ 14 1244 150310
Rocca di Botte AQ 14 856 151166
Roiate RM 15 737 151903
Subiaco RM 15 9074 160977
Zagarolo RM 15 17843 178820
Cave RM 15 11287 190107
Percile RM 16 255 190362
Vallinfreda RM 16 283 190645
Affile RM 16 1548 192193
Camerata Nuova RM 17 447 192640
Guidonia Montecelio RM 17 88673 281313
Vivaro Romano RM 18 182 281495
Arcinazzo Romano RM 18 1348 282843
San Cesareo RM 18 15153 297996
Palombara Sabina RM 18 13269 311265
Pereto AQ 19 682 311947
Labico RM 19 6379 318326
Serrone FR 19 3099 321425
Monteflavio RM 19 1348 322773
Sant'Angelo Romano RM 20 5018 327791
Colonna RM 20 4287 332078
Valmontone RM 20 15959 348037
Orvinio RI 20 405 348442
Paliano FR 20 8281 356723

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km E of Tivoli (56533 inhabitants)
17 Km E of Guidonia Montecelio (88673 inhabitants)
32 Km NE of Velletri (53303 inhabitants)
37 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)
59 Km SW of L'Aquila (69753 inhabitants)
60 Km E of Fiumicino (78395 inhabitants)
61 Km NE of Anzio (54211 inhabitants)
71 Km SE of Terni (111501 inhabitants)
85 Km SE of Viterbo (67173 inhabitants)
95 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 2.1 2023-07-07
09:15:20		 41.9547 12.9257 9 2023-07-07
09:40:05		 Sala Sismica INGV-Roma 119041331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-07 09:15:20 ± 0.1
Latitude 41.9547 ± 0.0063
Longitude 12.9257 ± 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 119041331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 941
Semi-minor axis of confidence ellipse (meter) 567
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 235
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.88943
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 10
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 119041331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-07 09:40:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
HL.VLS.HHZ. 2023-07-07T09:17:01.50 3.0 negative manual Pg 16.780001 0
IV.LADO.EHZ. 2023-07-07T09:16:54.42 3.0 undecidable manual Sn 1.57 0
IV.PLLN.EHZ. 2023-07-07T09:16:23.85 3.0 negative manual Pg 10.12 0
CR.STON.BHZ. 2023-07-07T09:16:23.90 3.0 undecidable manual Sn -2.22 0
IV.CTI.HHZ. 2023-07-07T09:16:18.40 3.0 undecidable manual Pg 12.86 0
SI.ROSI.HHZ. 2023-07-07T09:16:18.12 3.0 undecidable manual Pn 0.58 0
IV.SERS.HHZ. 2023-07-07T09:16:06.27 3.0 undecidable manual Pn -1.88 0
IX.MNT3.EHZ.02 2023-07-07T09:15:58.21 3.0 undecidable manual Sn -2.67 0
IV.CERA.HHZ. 2023-07-07T09:15:50.27 0.3 undecidable manual S 113 98.7234 50 0.66 54
IV.PII.HHZ. 2023-07-07T09:15:48.68 3.0 undecidable manual Pn -0.54 0
IV.LRP.EHZ. 2023-07-07T09:15:40.52 0.6 undecidable manual S 122 64.3911 50 0.05 45
IV.VVLD.HHZ. 2023-07-07T09:15:39.10 0.3 undecidable manual S 99 58.3971 50 0.25 66
IV.MOMA.HHZ. 2023-07-07T09:15:37.49 0.1 undecidable manual P 343 98.6235 50 0.22 82
IV.GIUL.HHZ. 2023-07-07T09:15:37.55 0.1 undecidable manual S 148 51.7038 50 0.47 85
IV.CERA.HHZ. 2023-07-07T09:15:36.74 0.1 undecidable manual P 113 98.7234 50 -0.54 76
IV.PTQR.HHZ. 2023-07-07T09:15:34.31 0.3 undecidable manual S 79 39.8268 50 0.4 66
IV.FIAM.HHZ. 2023-07-07T09:15:32.81 0.3 undecidable manual S 24 38.1285 50 -0.65 61
IV.VVLD.HHZ. 2023-07-07T09:15:31.13 0.1 undecidable manual P 99 58.3971 50 0.06 91
IV.LRP.EHZ. 2023-07-07T09:15:31.52 0.1 undecidable manual P 122 64.3911 50 -0.48 83
IV.GIUL.HHZ. 2023-07-07T09:15:29.65 0.3 positive manual P 148 51.7038 50 -0.39 65
IV.PTQR.HHZ. 2023-07-07T09:15:28.15 0.1 undecidable manual P 79 39.8268 50 -0.07 94
IV.MTCE.HHZ. 2023-07-07T09:15:27.46 0.1 undecidable manual S 297 16.872 119 0.33 93
IV.FIAM.HHZ. 2023-07-07T09:15:27.76 0.1 undecidable manual P 24 38.1285 50 -0.19 92
IV.RCAV.EHZ. 2023-07-07T09:15:25.35 0.1 undecidable manual S 172 11.9769 128 -0.36 93
IV.MTCE.HHZ. 2023-07-07T09:15:24.34 0.3 positive manual P 297 16.872 119 0.04 74
IV.CERT.HNZ. 2023-07-07T09:15:24.20 0.1 undecidable manual S 98 4.6953 153 0.15 99
IV.RCAV.EHZ. 2023-07-07T09:15:23.46 0.1 positive manual P 172 11.9769 128 -0.02 100
IV.CERT.HNZ. 2023-07-07T09:15:22.63 0.1 negative manual P 98 4.6953 153 0.11 99
IV.CAMP.HHZ. 2023-07-07T09:15:12.93 3.0 undecidable manual P -3.25 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RCAV.EHN. ML:2.3 0.00224 0.24 AML other m 2023-07-07T09:15:26.19
IV.RCAV.EHE. ML:2.4 0.0033049999999999998 0.34 AML other m 2023-07-07T09:15:26.79
IV.MTCE.HHE. ML:1.9 0.000732 1.52 AML other m 2023-07-07T09:15:28.23
IV.MTCE.HHN. ML:2.0 0.000868 1.54 AML other m 2023-07-07T09:15:29.04
IV.PTQR.HHN. ML:2.2 0.0005555 0.32 AML other m 2023-07-07T09:15:35.67
IV.PTQR.HHE. ML:2.0 0.0003215 0.78 AML other m 2023-07-07T09:15:36.16
IV.FIAM.HNN. ML:2.0 0.000358 0.84 AML other m 2023-07-07T09:15:39.40
IV.FIAM.HHN. ML:1.9 0.00031000000000000005 0.8 AML other m 2023-07-07T09:15:39.81
IV.GIUL.HHE. ML:1.9 0.0002155 0.36 AML other m 2023-07-07T09:15:39.51
IV.GIUL.HHN. ML:2.1 0.0003325 0.68 AML other m 2023-07-07T09:15:39.84
IV.FIAM.HHE. ML:2.0 0.000357 0.48 AML other m 2023-07-07T09:15:40.71
IV.FIAM.HNE. ML:2.1 0.000521 0.48 AML other m 2023-07-07T09:15:40.47
IV.LRP.EHN. ML:1.7 0.0000967 0.24 AML other m 2023-07-07T09:15:42.33
IV.VVLD.HHN. ML:2.0 0.0002175 0.34 AML other m 2023-07-07T09:15:43.05
IV.VVLD.HHE. ML:2.1 0.000253 0.48 AML other m 2023-07-07T09:15:44.54
IV.LRP.EHE. ML:2.2 0.0002745 0.28 AML other m 2023-07-07T09:15:46.20
IV.MOMA.HHN. ML:2.1 0.00011499999999999999 0.7 AML other m 2023-07-07T09:15:51.40
IV.MOMA.HNN. ML:2.3 0.0002075 0.62 AML other m 2023-07-07T09:15:52.01
IV.MOMA.HHE. ML:2.1 0.000142 0.66 AML other m 2023-07-07T09:15:53.44
IV.MOMA.HNE. ML:2.4 0.0002325 0.76 AML other m 2023-07-07T09:15:53.45
IV.CERA.HHN. ML:2.1 0.00012365 1.34 AML other m 2023-07-07T09:15:57.68
IV.CERA.HHE. ML:2.1 0.00011855 1.54 AML other m 2023-07-07T09:16:01.84
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
Waveforms Seismic signals in miniseed + resp format Download