Earthquake with magnitude of ML 1.2 on date 04-01-2021 and time 07:36:46 (UTC) in region 3 km W Spoleto (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km W Spoleto (PG), on

  • 04-01-2021 07:36:46 (UTC)
  • 04-01-2021 08:36:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.748, 12.706 at 14 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Spoleto PG 3 38218 38218
Castel Ritaldi PG 9 3278 41496
Campello sul Clitunno PG 10 2442 43938
Sant'Anatolia di Narco PG 11 564 44502
Scheggino PG 11 461 44963
Vallo di Nera PG 13 364 45327
Giano dell'Umbria PG 14 3846 49173
Acquasparta TR 14 4778 53951
Trevi PG 15 8469 62420
Massa Martana PG 15 3770 66190
Ferentillo TR 16 1913 68103
Montefalco PG 17 5679 73782
Montefranco TR 17 1276 75058
Arrone TR 19 2763 77821
Cerreto di Spoleto PG 19 1075 78896
Poggiodomo PG 19 117 79013
San Gemini TR 20 5018 84031

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km N of Terni (111501 inhabitants)
23 Km S of Foligno (57155 inhabitants)
48 Km SE of Perugia (166134 inhabitants)
61 Km NE of Viterbo (67173 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
82 Km W of Teramo (54892 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
87 Km N of Tivoli (56533 inhabitants)
97 Km N of Roma (2864731 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
Bulletin
Rev1000
ML 1.2 2021-01-04
07:36:46
42.7478 12.706 14 2021-07-12
16:54:55
Bollettino Sismico Italiano INGV 86264571
Reviewed
Rev100
ML 1.2 2021-01-04
07:36:47
42.7745 12.7507 8 2021-01-04
07:53:34
Sala Sismica INGV-Roma 86008431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-04 07:36:46 ± 0.08
Latitude 42.7478 ± 0.0036
Longitude 12.7060 ± 0.0049
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86264571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 429
Semi-minor axis of confidence ellipse (meter) 199
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 351
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.50182
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 86264571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-15 10:59:20

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 86008431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-04 07:53:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHE. 2021-01-04T07:37:03.79 0.6 undecidable manual S 47 0.5018 94 -0.06 46
IV.MMO1.HNE. 2021-01-04T07:37:03.28 0.6 undecidable manual S 71 0.4793 94 0.07 48
IV.MC2.EHZ. 2021-01-04T07:37:00.44 0.3 undecidable manual S 65 0.3903 96 -0.12 70
IV.FDMO.HHN. 2021-01-04T07:37:00.71 0.3 undecidable manual S 44 0.4011 96 -0.19 69
IV.NRCA.HHZ. 2021-01-04T07:36:58.05 0.6 undecidable manual S 74 0.3112 98 -0.2 47
IV.CESI.HNZ. 2021-01-04T07:36:57.46 0.6 undecidable manual S 29 0.295 99 -0.32 46
IV.LNSS.HHZ. 2021-01-04T07:36:57.73 0.6 undecidable manual S 120 0.2851 100 0.25 48
IV.MMO1.HNE. 2021-01-04T07:36:56.24 0.6 undecidable manual P 71 0.4793 94 0.09 48
IV.CSP1.EHE. 2021-01-04T07:36:56.71 0.6 undecidable manual P 47 0.5018 94 0.19 46
IV.MGAB.HHZ. 2021-01-04T07:36:55.51 0.1 undecidable manual P 291 0.4649 95 -0.39 89
IV.T1299.HNN. 2021-01-04T07:36:55.63 0.1 undecidable manual P 105 0.438 95 0.19 94
IV.FDMO.HHN. 2021-01-04T07:36:55.10 0.3 undecidable manual P 44 0.4011 96 0.28 70
IV.MC2.EHZ. 2021-01-04T07:36:54.83 0.6 undecidable manual P 65 0.3903 96 0.21 47
IV.LNSS.HHZ. 2021-01-04T07:36:53.08 0.1 undecidable manual P 120 0.2851 100 0.24 95
IV.NRCA.HHZ. 2021-01-04T07:36:53.23 0.3 undecidable manual P 74 0.3112 98 -0.06 73
IV.ASSB.HHN. 2021-01-04T07:36:53.41 0.3 undecidable manual P 353 0.2968 99 0.37 70
IV.GAVE.EHZ. 2021-01-04T07:36:53.40 0.3 undecidable manual S 112 0.1493 117 -0.22 74
IV.CESI.HNZ. 2021-01-04T07:36:53.01 0.1 undecidable manual P 29 0.295 99 0 99
IV.MOMA.HHZ. 2021-01-04T07:36:52.80 0.3 undecidable manual S 299 0.1142 127 0.05 76
IT.GNU.HGZ. 2021-01-04T07:36:52.93 0.3 undecidable manual S 299 0.1142 127 0.18 73
IV.CESX.HHZ. 2021-01-04T07:36:50.74 0.3 undecidable manual P 212 0.1646 114 -0.11 76
IV.MOMA.HHZ. 2021-01-04T07:36:50.23 0.1 undecidable manual P 299 0.1142 127 0.12 100
IV.ARRO.EHZ. 2021-01-04T07:36:50.72 0.1 undecidable manual P 165 0.1745 112 -0.28 97
IV.GAVE.EHZ. 2021-01-04T07:36:50.81 0.3 undecidable manual P 112 0.1493 117 0.2 74
IT.GNU.HGZ. 2021-01-04T07:36:49.88 0.6 undecidable manual P 299 0.1142 127 -0.23 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:1.3 0.00018316045 0.5632 AML other m 2021-01-04T07:36:53.22
IV.MOMA.HHN. ML:0.9 6.810452E-5 0.48 AML other m 2021-01-04T07:36:53.09
IV.GAVE.HNE. ML:1.4 0.00020808365 0.48 AML other m 2021-01-04T07:36:53.87
IV.GAVE.EHE. ML:1 7.371364E-5 0.416 AML other m 2021-01-04T07:36:53.64
IV.GAVE.EHN. ML:1.1 9.9267645E-5 0.1984 AML other m 2021-01-04T07:36:53.92
IV.NRCA.HNE. ML:1.6 0.000137890915 0.64 AML other m 2021-01-04T07:36:57.34
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