Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 22-03-2021 and time 13:09:01 (UTC) in region 4 km NW Sellano (PG)

A magnitude ML 1.3 earthquake occured in region: 4 km NW Sellano (PG), on

  • 22-03-2021 13:09:01 (UTC)
  • 22-03-2021 14:09:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9260, 12.9070 at 10 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.

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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
Sellano PG 4 1079 1079
Monte Cavallo MC 11 145 1224
Cerreto di Spoleto PG 12 1075 2299
Preci PG 12 724 3023
Trevi PG 14 8469 11492
Visso MC 15 1107 12599
Campello sul Clitunno PG 16 2442 15041
Serravalle di Chienti MC 17 1070 16111
Foligno PG 17 57155 73266
Vallo di Nera PG 18 364 73630
Pieve Torina MC 18 1458 75088
Ussita MC 19 444 75532
Valtopina PG 19 1398 76930
Fiordimonte MC 19 202 77132

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
47 Km E of Perugia (166134 inhabitants)
72 Km W of Teramo (54892 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
87 Km NE of Viterbo (67173 inhabitants)
92 Km SW of Ancona (100861 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 1.3 2021-03-22
13:09:01		 42.9258 12.9072 10 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91174001
Reviewed
Rev100 		ML 1.1 2021-03-22
13:09:01		 42.9227 12.9042 7 2021-03-22
13:19:50		 Sala Sismica INGV-Roma 88379481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-22 13:09:01 ± 0.05
Latitude 42.9258 ± 0.0018
Longitude 12.9072 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91174001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 323
Semi-minor axis of confidence ellipse (meter) 89
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
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) 106
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51981
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 91174001
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-12 16:59:03

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 88379481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-22 13:19:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-03-22T13:09:52.11 3.0 undecidable manual S 1 0
IV.SSFR.HHN. 2021-03-22T13:09:19.94 0.6 undecidable manual S 350 57.498 50 0.32 48
IV.CPGN.EHZ. 2021-03-22T13:09:19.68 3.0 undecidable manual P -1.93 0
IV.CING.HNZ. 2021-03-22T13:09:19.27 0.6 undecidable manual S 25 55.1004 50 0.3 48
IV.EL6.EHZ. 2021-03-22T13:09:17.02 0.6 undecidable manual S 19 47.4192 50 0.09 51
IV.ARRO.EHZ. 2021-03-22T13:09:15.24 0.6 undecidable manual S 197 40.1265 50 0.26 50
IV.LNSS.HNZ. 2021-03-22T13:09:14.18 0.6 undecidable manual S 163 37.4292 50 -0.08 52
IV.SNTG.HHE. 2021-03-22T13:09:13.70 0.6 undecidable manual S 4 36.6411 50 -0.34 49
IV.MMO1.EHN. 2021-03-22T13:09:13.36 0.6 undecidable manual S 95 34.2435 50 -0.04 53
IV.CSP1.EHZ. 2021-03-22T13:09:12.19 0.3 undecidable manual S 53 30.3474 50 -0.18 77
IV.PF6.EHZ. 2021-03-22T13:09:12.74 1.0 undecidable manual S 45 33.1446 50 -0.37 25
IV.SSFR.HHN. 2021-03-22T13:09:12.33 1.0 undecidable manual P 350 57.498 50 0.36 24
IV.MMUR.HNZ. 2021-03-22T13:09:12.39 0.6 negative manual P 7 57.6978 50 0.39 47
IV.CING.HNZ. 2021-03-22T13:09:11.93 1.0 undecidable manual P 25 55.1004 50 0.34 24
IV.GAVE.EHZ. 2021-03-22T13:09:11.14 0.3 undecidable manual S 182 25.9518 111 0 81
IV.MURB.HHZ. 2021-03-22T13:09:10.70 0.6 undecidable manual P 320 48.618 50 0.11 51
IV.EL6.EHZ. 2021-03-22T13:09:10.32 1.0 undecidable manual P 19 47.4192 50 -0.1 25
IV.ASSB.HHZ. 2021-03-22T13:09:10.16 0.3 undecidable manual S 303 23.9538 112 -0.34 76
IV.ARRO.EHZ. 2021-03-22T13:09:09.68 1.0 undecidable manual P 197 40.1265 50 0.39 24
IV.MC2.EHZ. 2021-03-22T13:09:09.98 0.6 undecidable manual S 94 22.9548 113 -0.19 52
IV.NRCA.HHZ. 2021-03-22T13:09:09.10 0.3 undecidable manual S 121 19.6692 116 -0.05 81
IV.MML1.HNZ. 2021-03-22T13:09:09.39 0.6 undecidable manual S 14 21.4674 114 -0.31 51
IV.LNSS.HNZ. 2021-03-22T13:09:08.78 1.0 undecidable manual P 163 37.4292 50 -0.09 26
IV.PF6.EHZ. 2021-03-22T13:09:08.40 1.0 undecidable manual P 45 33.1446 50 0.19 26
IV.SNTG.HHE. 2021-03-22T13:09:08.71 1.0 undecidable manual P 4 36.6411 50 -0.04 26
IV.MMO1.EHN. 2021-03-22T13:09:08.09 0.1 undecidable manual P 95 34.2435 50 -0.29 100
IV.CSP1.EHZ. 2021-03-22T13:09:07.65 0.6 undecidable manual P 53 30.3474 50 -0.14 52
IV.ASSB.HHZ. 2021-03-22T13:09:06.40 0.3 undecidable manual P 303 23.9538 112 -0.31 76
IV.CESI.HHZ. 2021-03-22T13:09:06.29 0.3 undecidable manual S 359 8.7801 138 0.21 80
IV.MML1.HNZ. 2021-03-22T13:09:06.13 0.6 undecidable manual P 14 21.4674 114 -0.12 53
IV.GAVE.EHZ. 2021-03-22T13:09:06.95 0.3 undecidable manual P 182 25.9518 111 -0.12 79
IV.MC2.EHZ. 2021-03-22T13:09:06.96 1.0 undecidable manual P 94 22.9548 113 0.44 25
IT.MTCL.HGZ. 2021-03-22T13:09:06.63 0.6 undecidable manual S 45 10.6782 133 0.1 54
IV.NRCA.HHZ. 2021-03-22T13:09:06.08 0.3 undecidable manual P 121 19.6692 116 0.15 79
IT.MTCL.HGZ. 2021-03-22T13:09:04.56 0.3 undecidable manual P 45 10.6782 133 0.14 81
IV.CESI.HHZ. 2021-03-22T13:09:04.43 0.3 undecidable manual P 359 8.7801 138 0.28 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.0001754468 0.1024 AML other m 2021-03-22T13:09:09.29
IV.NRCA.HHE. ML:1.1 0.00009649245 0.1216 AML other m 2021-03-22T13:09:09.38
IV.ASSB.HHE. ML:1.2 0.00011046995000000001 0.16 AML other m 2021-03-22T13:09:10.24
IV.ASSB.HHN. ML:1.1 0.00008202293499999999 0.16 AML other m 2021-03-22T13:09:10.27
IV.GAVE.EHE. ML:1.3 0.00012684610000000002 0.1984 AML other m 2021-03-22T13:09:11.33
IV.GAVE.HNN. ML:1.3 0.00010726057499999999 3.0656 AML other m 2021-03-22T13:09:12.22
IV.GAVE.HNE. ML:1.3 0.00011623326500000001 0.1216 AML other m 2021-03-22T13:09:12.16
IV.GAVE.EHN. ML:1.3 0.00010862448 0.16 AML other m 2021-03-22T13:09:11.35
IV.EL6.EHE. ML:1.5 0.000091207895 2.6176 AML other m 2021-03-22T13:09:16.68
IV.EL6.EHN. ML:1.4 0.000077442595 2.2592 AML other m 2021-03-22T13:09:17.51
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