Earthquake with magnitude of ML 1.1 on date 22-01-2021 and time 21:47:38 (UTC) in region 6 km W Sassoferrato (AN)

A magnitude ML 1.1 earthquake occured in region: 6 km W Sassoferrato (AN), on

  • 22-01-2021 21:47:38 (UTC)
  • 22-01-2021 22:47:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4330, 12.7840 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
Sassoferrato AN 6 7285 7285
Serra Sant'Abbondio PU 7 1027 8312
Scheggia e Pascelupo PG 10 1393 9705
Frontone PU 10 1300 11005
Costacciaro PG 10 1216 12221
Sigillo PG 12 2404 14625
Genga AN 12 1797 16422
Cantiano PU 13 2245 18667
Fabriano AN 15 31480 50147
Arcevia AN 15 4612 54759
Pergola PU 15 6333 61092
Fossato di Vico PG 15 2840 63932
Cagli PU 17 8731 72663
Gubbio PG 19 32216 104879
Serra San Quirico AN 19 2850 107729

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NE of Perugia (166134 inhabitants)
50 Km SW of Fano (60888 inhabitants)
53 Km N of Foligno (57155 inhabitants)
54 Km S of Pesaro (94582 inhabitants)
63 Km W of Ancona (100861 inhabitants)
72 Km S of Rimini (147750 inhabitants)
73 Km E of Arezzo (99543 inhabitants)
90 Km SE of Cesena (96758 inhabitants)
98 Km N of Terni (111501 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 1.1 2021-01-22
21:47:38
43.4332 12.7837 14 2021-07-12
16:54:57
Bollettino Sismico Italiano INGV 86943881
Reviewed
Rev100
ML 1.7 2021-01-22
21:47:38
43.4327 12.7907 14 2021-01-22
21:52:14
Sala Sismica INGV-Roma 86471691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 21:47:38 ± 0.06
Latitude 43.4332 ± 0.0027
Longitude 12.7837 ± 0.0037
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 86943881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 315
Semi-minor axis of confidence ellipse (meter) 133
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 252
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
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 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45416
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 13
Type of magnitude ML
Reference to an origin 86943881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-08 16:53:40

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 86471691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 21:52:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHE. 2021-01-22T21:47:55.29 0.3 undecidable manual S 151 50.4162 94 0.38 64
IV.ASSB.HHN. 2021-01-22T21:47:53.53 0.3 undecidable manual S 193 44.5221 95 0.19 67
IV.CING.HNZ. 2021-01-22T21:47:50.83 0.6 undecidable manual S 101 33.744 97 0.33 44
IV.ATCC.EHZ. 2021-01-22T21:47:49.73 0.6 undecidable manual S 203 29.8479 99 0.27 45
IV.NARO.HHZ. 2021-01-22T21:47:48.56 0.3 undecidable manual S 320 25.5522 101 0.23 68
IV.ASSB.HHN. 2021-01-22T21:47:47.13 0.3 undecidable manual P 193 44.5221 95 -0.14 68
IV.FDMO.HHE. 2021-01-22T21:47:47.98 0.1 undecidable manual P 151 50.4162 94 -0.2 88
IV.PIEI.HHZ. 2021-01-22T21:47:47.64 0.3 undecidable manual S 300 23.0547 104 -0.02 72
IV.CSP1.EHZ. 2021-01-22T21:47:47.91 3.0 positive manual P -0.27 0
IV.FOSV.EHZ. 2021-01-22T21:47:45.54 0.1 undecidable manual S 187 15.4734 117 -0.22 93
IV.ARVD.HHZ. 2021-01-22T21:47:45.38 0.3 undecidable manual S 60 14.5743 119 -0.18 70
IV.CING.HNZ. 2021-01-22T21:47:45.60 0.6 undecidable manual P 101 33.744 97 -0.03 47
IV.ATSC.EHZ. 2021-01-22T21:47:44.26 0.3 undecidable manual S 263 7.881 142 0.06 73
IV.NARO.HHZ. 2021-01-22T21:47:44.30 0.3 undecidable manual P 320 25.5522 101 -0.08 71
IV.ATCC.EHZ. 2021-01-22T21:47:44.93 0.1 positive manual P 203 29.8479 99 -0.1 93
IV.PIEI.HHZ. 2021-01-22T21:47:43.87 0.1 negative manual P 300 23.0547 104 -0.12 94
IV.SSFR.HNZ. 2021-01-22T21:47:43.52 0.1 undecidable manual S 341 0.3996 178 0.02 100
IV.ATSC.EHZ. 2021-01-22T21:47:42.07 0.1 negative manual P 263 7.881 142 0.08 97
IV.FOSV.EHZ. 2021-01-22T21:47:42.78 0.1 positive manual P 187 15.4734 117 -0.11 95
IV.ARVD.HHZ. 2021-01-22T21:47:42.74 0.1 positive manual P 60 14.5743 119 -0.04 97
IV.SSFR.HNZ. 2021-01-22T21:47:41.67 0.1 undecidable manual P 341 0.3996 178 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHN. ML:1.6 0.00058756895 0.0768 AML other m 2021-01-22T21:47:43.56
IV.SSFR.HHE. ML:1.6 0.0005119355999999999 0.0896 AML other m 2021-01-22T21:47:43.69
IV.SSFR.HNN. ML:1.8 0.00086426485 0.064 AML other m 2021-01-22T21:47:43.58
IV.SSFR.HNE. ML:1.7 0.00067157515 0.0512 AML other m 2021-01-22T21:47:43.69
IV.ARVD.HHE. ML:0.7 0.000043564325 0.0768 AML other m 2021-01-22T21:47:45.93
IV.ARVD.HHN. ML:0.6 0.000036839199 0.0768 AML other m 2021-01-22T21:47:45.79
IV.FOSV.EHE. ML:1.0 0.00008123527499999999 0.1408 AML other m 2021-01-22T21:47:45.64
IV.FOSV.EHN. ML:0.8 0.000053818266999999996 0.128 AML other m 2021-01-22T21:47:46.47
IV.PIEI.HHN. ML:0.9 0.00005070571 0.2048 AML other m 2021-01-22T21:47:47.72
IV.PIEI.HHE. ML:1.0 0.00005567051 0.0768 AML other m 2021-01-22T21:47:48.12
IV.NARO.HHN. ML:0.9 0.00004186433000000001 0.3712 AML other m 2021-01-22T21:47:48.56
IV.NARO.HHE. ML:1.0 0.000053877044999999996 0.1024 AML other m 2021-01-22T21:47:48.92
IV.ATCC.EHE. ML:1.3 0.00009565429000000001 1.2544 AML other m 2021-01-22T21:47:50.53
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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