Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 30-10-2021 and time 02:46:42 (Italy) in region 2 km S Morro Reatino (RI)

A magnitude ML 1.0 earthquake occured in region: 2 km S Morro Reatino (RI), on

  • 30-10-2021 00:46:42 (UTC)
  • 30-10-2021 02:46:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5060, 12.8250 at 14 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
Morro Reatino RI 2 373 373
Rivodutri RI 3 1253 1626
Labro RI 3 374 2000
Colli sul Velino RI 4 533 2533
Poggio Bustone RI 5 2055 4588
Greccio RI 7 1558 6146
Cantalice RI 8 2755 8901
Polino TR 9 233 9134
Arrone TR 10 2763 11897
Montefranco TR 11 1276 13173
Rieti RI 12 47698 60871
Contigliano RI 12 3783 64654
Leonessa RI 13 2435 67089
Ferentillo TR 13 1913 69002
Stroncone TR 13 4917 73919
Terni TR 16 111501 185420
Cottanello RI 16 563 185983
Cittaducale RI 17 6828 192811
Configni RI 17 633 193444
Montasola RI 18 395 193839
Monteleone di Spoleto PG 19 599 194438
Micigliano RI 20 127 194565
Monte San Giovanni in Sabina RI 20 714 195279

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Terni (111501 inhabitants)
50 Km W of L'Aquila (69753 inhabitants)
51 Km S of Foligno (57155 inhabitants)
57 Km N of Guidonia Montecelio (88673 inhabitants)
60 Km E of Viterbo (67173 inhabitants)
60 Km N of Tivoli (56533 inhabitants)
74 Km NE of Roma (2864731 inhabitants)
74 Km W of Teramo (54892 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
91 Km N of Velletri (53303 inhabitants)
95 Km NE of Fiumicino (78395 inhabitants)
96 Km E of Civitavecchia (52991 inhabitants)
97 Km N of Pomezia (62966 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 1.0 2021-10-30
00:46:42		 42.5058 12.8253 14 2021-10-30
00:51:20		 Sala Sismica INGV-Roma 97075231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-30 00:46:42 ± 0.05
Latitude 42.5058 ± 0.0027
Longitude 12.8253 ± 0.0024
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97075231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 297
Semi-minor axis of confidence ellipse (meter) 75
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 208
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.08544
Epicentral distance of station farthest from the epicenter (degree) 0.39570
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 97075231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-30 00:51:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-10-30T00:46:56.38 0.3 undecidable manual S 33 43.3233 96 -0.12 71
IV.SMA1.EHZ. 2021-10-30T00:46:56.88 0.3 undecidable manual S 71 43.9227 96 0.23 69
IV.MOMA.HHZ. 2021-10-30T00:46:55.43 0.3 undecidable manual S 328 39.0276 97 0.06 72
IV.FIAM.HHZ. 2021-10-30T00:46:54.34 0.3 undecidable manual S 138 35.6421 98 -0.12 72
IV.RM33.EHZ. 2021-10-30T00:46:53.50 0.3 undecidable manual S 89 31.8459 100 0.04 74
IV.CESX.HHZ. 2021-10-30T00:46:51.29 0.3 undecidable manual S 300 22.5552 107 0.23 72
IV.SMA1.EHZ. 2021-10-30T00:46:50.80 0.6 undecidable manual P 71 43.9227 96 0.16 47
IV.LNSS.HHZ. 2021-10-30T00:46:50.55 0.3 undecidable manual S 58 20.5683 110 -0.01 75
IV.GAVE.EHZ. 2021-10-30T00:46:50.65 0.3 undecidable manual S 15 21.4674 109 -0.12 74
IV.NRCA.HHZ. 2021-10-30T00:46:50.36 0.1 negative manual P 33 43.3233 96 -0.19 93
IV.RM33.EHZ. 2021-10-30T00:46:49.07 0.3 undecidable manual P 89 31.8459 100 0.27 70
IV.FIAM.HHZ. 2021-10-30T00:46:49.26 0.3 undecidable manual P 138 35.6421 98 -0.11 72
IV.MOMA.HHZ. 2021-10-30T00:46:49.80 0.1 undecidable manual P 328 39.0276 97 -0.1 96
IV.ARRO.EHZ. 2021-10-30T00:46:48.08 0.3 undecidable manual S 329 9.4794 139 0 77
IT.MMP1.HGE. 2021-10-30T00:46:48.36 0.3 undecidable manual P 193 29.1486 101 -0.04 74
IV.CESX.HHZ. 2021-10-30T00:46:47.40 0.3 undecidable manual P 300 22.5552 107 -0.01 75
IV.LNSS.HHZ. 2021-10-30T00:46:47.07 1.0 undecidable manual P 58 20.5683 110 -0.05 25
IV.GAVE.EHZ. 2021-10-30T00:46:47.20 0.1 positive manual P 15 21.4674 109 -0.04 100
IV.ARRO.EHZ. 2021-10-30T00:46:45.80 0.3 positive manual P 329 9.4794 139 0.11 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:0.9 0.0000817 0.64 AML other m 2021-10-30T00:46:48.33
IV.ARRO.EHE. ML:1.0 0.00008865 0.1 AML other m 2021-10-30T00:46:48.68
IV.GAVE.EHN. ML:1.2 0.00009185 0.36 AML other m 2021-10-30T00:46:50.93
IV.GAVE.EHE. ML:1.2 0.00009184999999999998 0.14 AML other m 2021-10-30T00:46:50.96
IV.CESX.HHN. ML:0.6 0.000023100000000000002 1.1 AML other m 2021-10-30T00:46:51.18
IV.CESX.HHE. ML:0.6 0.000022800000000000002 0.42 AML other m 2021-10-30T00:46:51.40
IV.LNSS.HHN. ML:1.4 0.0001585 0.42 AML other m 2021-10-30T00:46:51.23
IV.LNSS.HHE. ML:1.3 0.000134 0.1 AML other m 2021-10-30T00:46:51.45
IV.NRCA.HHN. ML:0.8 0.000017899999999999998 0.86 AML other m 2021-10-30T00:46:56.05
IV.NRCA.HHE. ML:0.8 0.00002035 1.06 AML other m 2021-10-30T00:46:56.61
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