Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 22-03-2021 and time 21:40:51 (Italy) in region 1 km NW Pioraco (MC)

A magnitude ML 1.2 earthquake occured in region: 1 km NW Pioraco (MC), on

  • 22-03-2021 20:40:51 (UTC)
  • 22-03-2021 21:40:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1910, 12.9790 at 20 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
Pioraco MC 1 1134 1134
Fiuminata MC 4 1402 2536
Sefro MC 5 422 2958
Castelraimondo MC 7 4587 7545
Esanatoglia MC 7 2034 9579
Matelica MC 8 9981 19560
Gagliole MC 9 620 20180
Camerino MC 10 6974 27154
Muccia MC 13 915 28069
Serravalle di Chienti MC 13 1070 29139
Cerreto d'Esi AN 15 3817 32956
Gualdo Tadino PG 16 15208 48164
Pievebovigliana MC 17 866 49030
San Severino Marche MC 17 12726 61756
Serrapetrona MC 17 966 62722
Pieve Torina MC 17 1458 64180
Fabriano AN 17 31480 95660
Nocera Umbra PG 18 5839 101499
Fiordimonte MC 19 202 101701

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NE of Foligno (57155 inhabitants)
49 Km E of Perugia (166134 inhabitants)
65 Km SW of Ancona (100861 inhabitants)
73 Km S of Fano (60888 inhabitants)
75 Km NE of Terni (111501 inhabitants)
80 Km S of Pesaro (94582 inhabitants)
84 Km NW of Teramo (54892 inhabitants)
94 Km E of Arezzo (99543 inhabitants)
99 Km NW of L'Aquila (69753 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 2021-03-22
20:40:51		 43.1913 12.979 20 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91285131
Reviewed
Rev100 		ML 1.3 2021-03-22
20:40:51		 43.1937 12.9845 19 2021-03-22
20:49:01		 Sala Sismica INGV-Roma 88391111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-22 20:40:51 ± 0.07
Latitude 43.1913 ± 0.0018
Longitude 12.9790 ± 0.0037
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91285131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 270
Semi-minor axis of confidence ellipse (meter) 20
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 267
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.06925
Epicentral distance of station farthest from the epicenter (degree) 0.50902
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 91285131
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-14 17:02:38

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 88391111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-22 20:49:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHN. 2021-03-22T20:41:09.29 1.0 undecidable manual S 326 56.499 101 0.28 29
IV.FRON.EHZ. 2021-03-22T20:41:05.10 0.3 undecidable manual S 331 41.625 106 -0.02 94
IV.ARVD.HHZ. 2021-03-22T20:41:03.28 0.6 undecidable manual S 355 34.1436 111 0.03 63
IV.SSFR.HHZ. 2021-03-22T20:41:02.45 0.6 undecidable manual S 330 31.4463 113 -0.13 62
IV.ASSB.HHZ. 2021-03-22T20:41:02.48 0.6 undecidable manual S 238 30.747 114 0.07 63
IV.CING.HNZ. 2021-03-22T20:41:01.60 0.6 undecidable manual S 40 26.8509 118 0.12 63
IV.NARO.HHN. 2021-03-22T20:41:01.33 1.0 undecidable manual P 326 56.499 101 -0.16 30
IV.CESI.HHZ. 2021-03-22T20:41:00.39 0.3 undecidable manual S 196 21.5673 125 0.14 95
IV.CSP1.EHZ. 2021-03-22T20:41:00.40 0.6 undecidable manual S 121 21.3675 125 0.18 63
IV.EL6.EHZ. 2021-03-22T20:40:59.60 0.6 undecidable manual S 33 18.2706 130 0.04 65
IV.FRON.EHZ. 2021-03-22T20:40:59.45 0.6 undecidable manual P 331 41.625 106 0.2 60
IV.NRCA.HHZ. 2021-03-22T20:40:58.91 0.6 undecidable manual P 164 41.1255 107 -0.28 60
IV.ARVD.HHZ. 2021-03-22T20:40:58.10 1.0 undecidable manual P 355 34.1436 111 -0.07 31
IV.SNTG.HHZ. 2021-03-22T20:40:57.67 0.3 undecidable manual S 336 7.6812 155 -0.17 97
IV.ASSB.HHZ. 2021-03-22T20:40:57.76 0.6 undecidable manual P 238 30.747 114 0.08 63
IV.CING.HNZ. 2021-03-22T20:40:57.03 0.6 undecidable manual P 40 26.8509 118 -0.11 63
IV.SSFR.HHZ. 2021-03-22T20:40:57.93 0.6 undecidable manual P 330 31.4463 113 0.15 62
IV.MML1.EHZ. 2021-03-22T20:40:57.95 0.3 undecidable manual S 184 8.6802 153 0 100
IV.CESI.HHZ. 2021-03-22T20:40:56.32 0.3 undecidable manual P 196 21.5673 125 -0.12 96
IV.CSP1.EHZ. 2021-03-22T20:40:56.51 0.6 undecidable manual P 121 21.3675 125 0.09 64
IV.EL6.EHZ. 2021-03-22T20:40:56.02 0.6 undecidable manual P 33 18.2706 130 -0.01 65
IV.MML1.EHZ. 2021-03-22T20:40:55.08 0.6 undecidable manual P 184 8.6802 153 -0.03 66
IV.SNTG.HHZ. 2021-03-22T20:40:54.88 0.3 undecidable manual P 336 7.6812 155 -0.16 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNTG.HHE. ML:0.7 0.000037550305 2.432 AML other m 2021-03-22T20:41:00.26
IV.SNTG.HNE. ML:1.2 0.00013369914999999998 3.584 AML other m 2021-03-22T20:40:59.96
IV.SNTG.HHN. ML:0.8 0.000047561640000000005 0.128 AML other m 2021-03-22T20:40:57.79
IV.SNTG.HNN. ML:1.5 0.00023656245000000002 3.2512 AML other m 2021-03-22T20:40:59.12
IV.EL6.EHN. ML:1.2 0.00010041997 3.8016 AML other m 2021-03-22T20:41:00.92
IV.EL6.EHE. ML:1.2 0.00010184749499999999 0.2816 AML other m 2021-03-22T20:41:00.62
IV.CESI.HHE. ML:1.2 0.00008349249 0.4608 AML other m 2021-03-22T20:41:00.78
IV.CESI.HHN. ML:1.2 0.000093479175 0.4608 AML other m 2021-03-22T20:41:00.83
IV.SSFR.HHN. ML:1.3 0.00007743992 1.792 AML other m 2021-03-22T20:41:04.51
IV.SSFR.HHE. ML:1.3 0.00007783156499999999 0.7552 AML other m 2021-03-22T20:41:03.72
IV.ARVD.HHE. ML:1.3 0.000072351575 2.8544 AML other m 2021-03-22T20:41:04.33
IV.ARVD.HHN. ML:1.3 0.000070051055 3.4816 AML other m 2021-03-22T20:41:06.05
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