Earthquake with magnitude of ML 1.8 on date 12-10-2021 and time 23:31:34 (UTC) in region 3 km SW Cittaducale (RI)

A magnitude ML 1.8 earthquake occured in region: 3 km SW Cittaducale (RI), on

  • 12-10-2021 23:31:34 (UTC)
  • 13-10-2021 01:31:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.366, 12.92 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
Cittaducale RI 3 6828 6828
Belmonte in Sabina RI 6 636 7464
Rieti RI 7 47698 55162
Concerviano RI 7 291 55453
Castel Sant'Angelo RI 10 1308 56761
Rocca Sinibalda RI 10 815 57576
Longone Sabino RI 11 597 58173
Cantalice RI 12 2755 60928
Torricella in Sabina RI 12 1342 62270
Monte San Giovanni in Sabina RI 12 714 62984
Borgo Velino RI 12 972 63956
Montenero Sabino RI 13 299 64255
Contigliano RI 14 3783 68038
Poggio San Lorenzo RI 14 589 68627
Antrodoco RI 15 2588 71215
Petrella Salto RI 15 1197 72412
Micigliano RI 15 127 72539
Poggio Bustone RI 16 2055 74594
Monteleone Sabino RI 16 1224 75818
Casaprota RI 16 744 76562
Greccio RI 16 1558 78120
Varco Sabino RI 16 187 78307
Castel di Tora RI 17 288 78595
Colle di Tora RI 17 372 78967
Rivodutri RI 18 1253 80220
Frasso Sabino RI 18 743 80963
Poggio Moiano RI 18 2751 83714
Marcetelli RI 19 89 83803
Salisano RI 19 567 84370
Colli sul Velino RI 19 533 84903
Mompeo RI 19 530 85433
Roccantica RI 19 563 85996
Morro Reatino RI 19 373 86369
Poggio Nativo RI 19 2622 88991
Cottanello RI 20 563 89554
Montasola RI 20 395 89949
Ascrea RI 20 234 90183

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SE of Terni (111501 inhabitants)
39 Km W of L'Aquila (69753 inhabitants)
44 Km NE of Guidonia Montecelio (88673 inhabitants)
46 Km N of Tivoli (56533 inhabitants)
64 Km NE of Roma (2864731 inhabitants)
67 Km E of Viterbo (67173 inhabitants)
68 Km S of Foligno (57155 inhabitants)
72 Km W of Teramo (54892 inhabitants)
76 Km N of Velletri (53303 inhabitants)
85 Km NE of Pomezia (62966 inhabitants)
87 Km NE of Fiumicino (78395 inhabitants)
89 Km N of Aprilia (73446 inhabitants)
93 Km SE of Perugia (166134 inhabitants)
98 Km E of Civitavecchia (52991 inhabitants)
100 Km N of Latina (125985 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.8 2021-10-12
23:31:34
42.3657 12.9197 8 2021-10-13
01:13:43
Sala Sismica INGV-Roma 96483351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 23:31:34 ± 0.34
Latitude 42.3657 ± 0.0135
Longitude 12.9197 ± 0.0122
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 96483351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1558
Semi-minor axis of confidence ellipse (meter) 952
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 1560
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 275
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.75543
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.5
Num. used stations 30
Type of magnitude ML
Reference to an origin 96483351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-13 01:13:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CANO.HHZ. 2021-10-12T23:32:56.07 3.0 undecidable manual Sg 4.91 0
IV.EFIU.HHZ. 2021-10-12T23:32:50.28 3.0 negative manual Pn 1.86 0
IV.PAOL.HHZ. 2021-10-12T23:32:46.73 3.0 undecidable manual Sg 5.94 0
IV.ECTS.HHZ. 2021-10-12T23:32:41.62 3.0 undecidable manual Pn -5.27 0
IV.ICAI.EHZ. 2021-10-12T23:32:10.77 3.0 negative manual Pg 4.7 0
MN.TRI.HHZ. 2021-10-12T23:32:08.62 3.0 positive manual Pg 3.98 0
IV.VIVA.HHZ. 2021-10-12T23:32:08.87 3.0 undecidable manual S -1.99 0
IV.MSSA.HHZ. 2021-10-12T23:32:02.91 3.0 undecidable manual Pg 2.66 0
IV.MF5.EHZ. 2021-10-12T23:32:00.13 0.1 undecidable manual S 32 0.7374 50 0.86 72
IV.CSP1.EHZ. 2021-10-12T23:31:59.85 0.1 undecidable manual S 16 0.7554 50 0.05 91
IV.FDMO.HHZ. 2021-10-12T23:31:58.46 0.1 undecidable manual S 10 0.6817 50 0.84 73
IV.MMO1.EHZ. 2021-10-12T23:31:55.27 0.1 undecidable manual S 29 0.6115 50 -0.27 89
IV.MC2.EHZ. 2021-10-12T23:31:55.10 0.1 undecidable manual S 20 0.5801 50 0.49 86
IV.NRCA.HHZ. 2021-10-12T23:31:51.44 0.1 undecidable manual S 17 0.4892 50 -0.48 88
IV.CSP1.EHZ. 2021-10-12T23:31:49.31 0.1 undecidable manual P 16 0.7554 50 0.27 87
IV.SMA1.EHZ. 2021-10-12T23:31:49.53 0.1 undecidable manual S 49 0.4047 50 0.11 96
IV.MF5.EHZ. 2021-10-12T23:31:48.55 0.1 undecidable manual P 32 0.7374 50 -0.19 89
IV.FDMO.HHZ. 2021-10-12T23:31:47.66 0.1 undecidable manual P 10 0.6817 50 -0.12 91
IV.MC2.EHZ. 2021-10-12T23:31:46.00 0.1 undecidable manual P 20 0.5801 50 -0.05 94
IV.MMO1.EHZ. 2021-10-12T23:31:46.47 0.1 undecidable manual P 29 0.6115 50 -0.11 93
IV.GAVE.EHZ. 2021-10-12T23:31:46.22 0.1 undecidable manual S 357 0.3274 50 -0.89 77
IV.LNSS.HHZ. 2021-10-12T23:31:44.21 0.1 undecidable manual S 21 0.2536 106 -0.29 96
IV.SRES.HHZ. 2021-10-12T23:31:44.10 3.0 positive manual P 2.78 0
IV.ARRO.EHZ. 2021-10-12T23:31:44.21 0.1 undecidable manual S 332 0.2419 107 0.14 99
IV.RM33.EHZ. 2021-10-12T23:31:44.69 0.1 undecidable manual S 57 0.2608 106 -0.08 100
IV.NRCA.HHZ. 2021-10-12T23:31:44.05 0.1 undecidable manual P 17 0.4892 50 -0.44 89
IV.SMA1.EHZ. 2021-10-12T23:31:43.04 1.0 positive manual P 49 0.4047 50 0 25
IV.CESX.HHZ. 2021-10-12T23:31:42.77 3.0 undecidable manual S -2.85 0
IV.GAVE.EHZ. 2021-10-12T23:31:41.51 0.1 undecidable manual P 357 0.3274 50 -0.2 96
IV.ARRO.EHZ. 2021-10-12T23:31:40.42 0.1 undecidable manual P 332 0.2419 107 0.46 92
IV.RM33.EHZ. 2021-10-12T23:31:40.49 0.1 positive manual P 57 0.2608 106 0.13 99
IV.LNSS.HHZ. 2021-10-12T23:31:39.88 1.0 undecidable manual P 21 0.2536 106 -0.32 24
IV.FIR.HHZ. 2021-10-12T23:31:38.45 3.0 undecidable manual P -2.51 0
IV.APEC.HHZ. 2021-10-12T23:31:34.36 3.0 undecidable manual S 0.93 0
IV.EL6.EHZ. 2021-10-12T23:31:33.66 3.0 negative manual P 1.22 0
IV.NARO.HHZ. 2021-10-12T23:31:25.86 3.0 negative manual P -3.69 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIR.HHE. ML:3 0.0002725 0.22 AML other m 2021-10-12T23:31:40.19
IV.FIR.HNE. ML:3 0.000292 0.5 AML other m 2021-10-12T23:31:40.44
IV.FIR.HNN. ML:3 0.000255 0.42 AML other m 2021-10-12T23:31:40.90
IV.ARRO.EHN. ML:1.5 0.00019 0.2 AML other m 2021-10-12T23:31:44.39
IV.LNSS.HHE. ML:1.9 0.0004385 1.48 AML other m 2021-10-12T23:31:44.89
IV.RM33.HNN. ML:1.8 0.000352 0.3 AML other m 2021-10-12T23:31:45.04
IV.RM33.EHN. ML:1.8 0.000323 0.32 AML other m 2021-10-12T23:31:45.04
IV.RM33.HNE. ML:1.8 0.000366 0.24 AML other m 2021-10-12T23:31:45.43
IV.FIR.HHN. ML:2.9 0.0002355 0.08 AML other m 2021-10-12T23:31:45.39
IV.RM33.EHE. ML:1.8 0.00036 0.34 AML other m 2021-10-12T23:31:46.81
IV.GAVE.EHE. ML:2.1 0.0004715 0.2 AML other m 2021-10-12T23:31:46.67
IV.ARRO.EHE. ML:1.7 0.000272 1.74 AML other m 2021-10-12T23:31:46.04
IV.LNSS.HHN. ML:1.8 0.000327 0.9 AML other m 2021-10-12T23:31:47.43
IV.GAVE.EHN. ML:2.1 0.0005095 0.18 AML other m 2021-10-12T23:31:47.92
IV.CESX.HHN. ML:1.4 8.79E-5 1.48 AML other m 2021-10-12T23:31:49.84
IV.SRES.HHE. ML:1.2 6.66E-5 1.26 AML other m 2021-10-12T23:31:51.15
IV.CESX.HHE. ML:1.3 8.12E-5 1.12 AML other m 2021-10-12T23:31:51.26
IV.NRCA.HHN. ML:1.6 8.4E-5 0.1 AML other m 2021-10-12T23:31:52.36
IV.NRCA.HHE. ML:1.7 0.0001305 0.2 AML other m 2021-10-12T23:31:52.62
IV.SRES.HHN. ML:1.1 4.7E-5 0.54 AML other m 2021-10-12T23:31:53.38
IV.SMA1.EHN. ML:1.7 0.0001595 1.46 AML other m 2021-10-12T23:31:53.88
IV.SMA1.EHE. ML:1.7 0.000148 1.3 AML other m 2021-10-12T23:31:54.12
IV.FDMO.HHN. ML:1.5 4.57E-5 0.38 AML other m 2021-10-12T23:31:58.88
IV.FDMO.HHE. ML:1.5 5.06E-5 1.22 AML other m 2021-10-12T23:31:58.91
IV.VIVA.HHN. ML:1.8 9.35E-5 0.9 AML other m 2021-10-12T23:32:08.83
IV.VIVA.HHE. ML:1.7 9.2E-5 0.5 AML other m 2021-10-12T23:32:10.40
IV.MSSA.HHN. ML:3.1 9.755E-5 0.44 AML other m 2021-10-12T23:32:12.38
IV.MSSA.HHE. ML:3.1 0.00011425 0.44 AML other m 2021-10-12T23:32:13.61
GU.CANO.HHN. ML:2.9 3.655E-5 0.62 AML other m 2021-10-12T23:32:58.43
GU.CANO.HHE. ML:3.5 0.0001495 0.78 AML other m 2021-10-12T23:33:01.79
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