Earthquake with magnitude of ML 1.0 on date 31-10-2021 and time 02:48:27 (Italy) in region 3 km E Monte San Giovanni in Sabina (RI)

A magnitude ML 1.0 earthquake occured in region: 3 km E Monte San Giovanni in Sabina (RI), on

  • 31-10-2021 01:48:27 (UTC)
  • 31-10-2021 02:48:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.338, 12.815 at 17 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
Monte San Giovanni in Sabina RI 3 714 714
Montenero Sabino RI 6 299 1013
Belmonte in Sabina RI 7 636 1649
Rieti RI 9 47698 49347
Contigliano RI 9 3783 53130
Casaprota RI 10 744 53874
Torricella in Sabina RI 10 1342 55216
Poggio San Lorenzo RI 10 589 55805
Roccantica RI 10 563 56368
Salisano RI 11 567 56935
Poggio Catino RI 11 1341 58276
Mompeo RI 11 530 58806
Rocca Sinibalda RI 12 815 59621
Casperia RI 12 1246 60867
Frasso Sabino RI 12 743 61610
Monteleone Sabino RI 12 1224 62834
Montasola RI 12 395 63229
Cittaducale RI 12 6828 70057
Cottanello RI 13 563 70620
Castelnuovo di Farfa RI 13 1059 71679
Poggio Mirteto RI 13 6315 77994
Poggio Nativo RI 14 2622 80616
Greccio RI 14 1558 82174
Cantalupo in Sabina RI 14 1685 83859
Concerviano RI 14 291 84150
Longone Sabino RI 14 597 84747
Montopoli di Sabina RI 14 4210 88957
Torri in Sabina RI 15 1256 90213
Toffia RI 15 1058 91271
Vacone RI 16 256 91527
Fara in Sabina RI 16 13742 105269
Selci RI 16 1106 106375
Poggio Moiano RI 16 2751 109126
Cantalice RI 16 2755 111881
Configni RI 17 633 112514
Colle di Tora RI 18 372 112886
Montebuono RI 18 883 113769
Tarano RI 18 1444 115213
Colli sul Velino RI 18 533 115746
Castel di Tora RI 18 288 116034
Forano RI 19 3179 119213
Castel Sant'Angelo RI 19 1308 120521
Scandriglia RI 19 3108 123629
Poggio Bustone RI 19 2055 125684
Nerola RM 20 1926 127610
Torrita Tiberina RM 20 1089 128699
Filacciano RM 20 477 129176

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SE of Terni (111501 inhabitants)
38 Km N of Guidonia Montecelio (88673 inhabitants)
42 Km N of Tivoli (56533 inhabitants)
48 Km W of L'Aquila (69753 inhabitants)
56 Km NE of Roma (2864731 inhabitants)
59 Km E of Viterbo (67173 inhabitants)
69 Km S of Foligno (57155 inhabitants)
72 Km N of Velletri (53303 inhabitants)
79 Km NE of Pomezia (62966 inhabitants)
79 Km NE of Fiumicino (78395 inhabitants)
81 Km W of Teramo (54892 inhabitants)
84 Km N of Aprilia (73446 inhabitants)
88 Km E of Civitavecchia (52991 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
97 Km N of Latina (125985 inhabitants)
100 Km N of Anzio (54211 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 1.0 2021-10-31
01:48:27
42.3377 12.8152 17 2021-10-31
01:57:14
Sala Sismica INGV-Roma 97101881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-31 01:48:27 ± 0.11
Latitude 42.3377 ± 0.0036
Longitude 12.8152 ± 0.0036
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97101881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 345
Semi-minor axis of confidence ellipse (meter) 241
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 307
Circular confidence region, given by single value of horizontal uncertainty (meter) 340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.54229
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 97101881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-31 01:57:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PE3.EHZ. 2021-10-31T01:49:12.01 3.0 undecidable manual S 3.76 0
IV.PE3.EHZ. 2021-10-31T01:48:50.07 3.0 undecidable manual P -0.12 0
IV.SMA1.EHZ. 2021-10-31T01:48:44.72 0.6 undecidable manual S 52 0.482 98 0.28 44
IV.VIVA.HHZ. 2021-10-31T01:48:40.15 3.0 undecidable manual P 0.43 0
IV.RM33.EHZ. 2021-10-31T01:48:40.44 0.3 undecidable manual S 60 0.3408 103 0.12 70
IV.LNSS.HHN. 2021-10-31T01:48:39.52 0.3 undecidable manual S 32 0.313 104 0.01 72
IV.NRCA.HHZ. 2021-10-31T01:48:38.14 0.6 positive manual P 24 0.5423 97 -0.2 44
IV.SRES.HHZ. 2021-10-31T01:48:37.81 0.3 undecidable manual S 246 0.2473 110 0.17 71
IV.SMA1.EHZ. 2021-10-31T01:48:37.30 0.6 positive manual P 52 0.482 98 -0.02 47
IV.ARRO.EHZ. 2021-10-31T01:48:37.51 0.3 undecidable manual S 351 0.2437 110 -0.05 72
IV.FIAM.HHZ. 2021-10-31T01:48:37.30 0.3 undecidable manual S 107 0.2338 111 0.02 73
IV.RM33.EHZ. 2021-10-31T01:48:34.81 0.3 positive manual P 60 0.3408 103 -0.13 70
IV.LNSS.HHN. 2021-10-31T01:48:34.24 0.3 undecidable manual P 32 0.313 104 -0.23 69
IV.FIAM.HHZ. 2021-10-31T01:48:33.07 0.6 negative manual P 107 0.2338 111 -0.11 48
IV.SRES.HHZ. 2021-10-31T01:48:33.40 0.6 positive manual P 246 0.2473 110 0 49
IT.MMP1.HGN. 2021-10-31T01:48:33.93 0.3 undecidable manual S 209 0.1016 139 -0.09 74
IV.ARRO.EHZ. 2021-10-31T01:48:33.52 0.6 negative manual P 351 0.2437 110 0.17 47
IT.MMP1.HGN. 2021-10-31T01:48:31.33 0.1 undecidable manual P 209 0.1016 139 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.1 5.885E-5 0.84 AML other m 2021-10-31T01:48:37.83
IV.ARRO.EHE. ML:0.9 3.69E-5 1.14 AML other m 2021-10-31T01:48:38.28
IV.RM33.EHE. ML:0.9 2.8E-5 1.18 AML other m 2021-10-31T01:48:41.09
IV.RM33.EHN. ML:0.9 2.76E-5 0.6 AML other m 2021-10-31T01:48:42.69
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