Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-03-2021 and time 09:43:44 (Italy) in region 4 km SW Valfabbrica (PG)

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

  • 21-03-2021 08:43:44 (UTC)
  • 21-03-2021 09:43:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1430, 12.5630 at 9 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Valfabbrica PG 4 3389 3389
Bastia Umbra PG 8 21874 25263
Assisi PG 9 28299 53562
Perugia PG 15 166134 219696
Bettona PG 16 4367 224063
Cannara PG 16 4305 228368
Torgiano PG 17 6725 235093
Valtopina PG 18 1398 236491
Spello PG 19 8645 245136
Nocera Umbra PG 19 5839 250975

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Perugia (166134 inhabitants)
24 Km NW of Foligno (57155 inhabitants)
65 Km N of Terni (111501 inhabitants)
66 Km SE of Arezzo (99543 inhabitants)
86 Km SW of Fano (60888 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
90 Km SW of Pesaro (94582 inhabitants)
94 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 2021-03-21
08:43:44		 43.1428 12.5628 9 2021-07-12
16:55:04		 Bollettino Sismico Italiano INGV 88743151
Reviewed
Rev100 		ML 1.6 2021-03-21
08:43:44		 43.14 12.5602 8 2021-03-21
09:10:12		 Sala Sismica INGV-Roma 88341941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-21 08:43:44 ± 0.04
Latitude 43.1428 ± 0.0018
Longitude 12.5628 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88743151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 292
Semi-minor axis of confidence ellipse (meter) 49
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
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) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.51171
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 17
Type of magnitude ML
Reference to an origin 88341941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-21 09:10:12

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 88743151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-03 15:41:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2021-03-21T08:44:02.70 0.6 undecidable manual S 152 56.7987 50 0.48 42
IV.CSP1.EHZ. 2021-03-21T08:44:01.48 0.6 undecidable manual S 96 52.3032 50 0.46 43
IV.EL6.EHZ. 2021-03-21T08:44:00.52 0.3 undecidable manual S 64 48.2184 50 0.58 62
IV.MGAB.HNE. 2021-03-21T08:43:59.26 0.6 undecidable manual S 235 44.622 50 0.29 45
IV.FRON.EHZ. 2021-03-21T08:43:58.59 0.6 undecidable manual S 17 43.623 50 -0.12 46
IV.ATPC.HHE. 2021-03-21T08:43:57.78 0.3 undecidable manual S 347 38.4282 50 0.45 65
IV.MOMA.HHN. 2021-03-21T08:43:57.28 0.6 undecidable manual S 179 37.629 50 0.17 46
IV.SSFR.HHN. 2021-03-21T08:43:56.93 0.1 undecidable manual S 28 37.0296 50 -0.03 96
IV.ATPI.EHE. 2021-03-21T08:43:56.99 0.1 undecidable manual S 339 36.5412 50 0.17 93
IV.ATBU.EHZ. 2021-03-21T08:43:56.66 0.1 undecidable manual S 358 36.9297 50 -0.27 91
IV.CESI.HHZ. 2021-03-21T08:43:55.16 0.6 undecidable manual S 119 31.6461 105 -0.29 46
IV.TB03.DHZ.01 2021-03-21T08:43:55.18 0.1 undecidable manual S 337 31.2465 105 -0.12 95
IV.SNTG.HHE. 2021-03-21T08:43:55.73 0.6 undecidable manual S 68 32.9448 50 -0.14 47
IV.MML1.HNE. 2021-03-21T08:43:55.77 0.1 undecidable manual S 95 33.2445 50 -0.18 93
IV.ATSC.EHE. 2021-03-21T08:43:55.58 0.1 undecidable manual S 18 32.745 50 -0.23 92
IV.GAVE.EHZ. 2021-03-21T08:43:54.48 0.3 undecidable manual P 152 56.7987 50 -0.07 69
IV.EL6.EHZ. 2021-03-21T08:43:53.26 0.3 undecidable manual P 64 48.2184 50 0.03 70
IV.ATFO.HNE. 2021-03-21T08:43:53.76 0.6 undecidable manual S 2 24.8529 109 0.57 43
IV.CSP1.EHZ. 2021-03-21T08:43:53.73 0.3 undecidable manual P 96 52.3032 50 -0.13 68
IV.FOSV.EHZ. 2021-03-21T08:43:53.02 0.6 undecidable manual S 43 23.2545 110 0.34 46
IV.MGAB.HNE. 2021-03-21T08:43:53.02 0.3 undecidable manual P 235 44.622 50 0.35 66
IV.ATVA.EHN. 2021-03-21T08:43:53.71 0.3 undecidable manual S 304 27.0507 108 -0.2 70
IT.FOPC.HGZ. 2021-03-21T08:43:52.57 0.6 undecidable manual S 149 22.3554 111 0.2 47
IV.ATLO.EHN. 2021-03-21T08:43:52.51 0.3 undecidable manual S 327 22.8549 111 -0.05 73
IV.FRON.EHZ. 2021-03-21T08:43:52.32 0.3 undecidable manual P 17 43.623 50 -0.2 68
IV.ATPI.EHE. 2021-03-21T08:43:51.39 0.1 undecidable manual P 339 36.5412 50 -0.04 96
IV.MOMA.HHN. 2021-03-21T08:43:51.30 0.3 undecidable manual P 179 37.629 50 -0.3 68
IV.ATBU.EHZ. 2021-03-21T08:43:51.42 0.1 undecidable manual P 358 36.9297 50 -0.07 95
IV.SSFR.HHN. 2021-03-21T08:43:51.30 0.1 undecidable manual P 28 37.0296 50 -0.21 92
IV.ATPC.HHE. 2021-03-21T08:43:51.65 0.1 undecidable manual P 347 38.4282 50 -0.07 95
IV.SNTG.HHE. 2021-03-21T08:43:50.77 0.3 undecidable manual P 68 32.9448 50 -0.11 71
IV.MML1.HNE. 2021-03-21T08:43:50.92 0.1 undecidable manual P 95 33.2445 50 -0.01 97
IV.ATSC.EHE. 2021-03-21T08:43:50.75 0.1 undecidable manual P 18 32.745 50 -0.1 95
IV.CESI.HHZ. 2021-03-21T08:43:50.48 0.1 undecidable manual P 119 31.6461 105 -0.16 94
IV.TB03.DHZ.01 2021-03-21T08:43:50.50 0.1 undecidable manual P 337 31.2465 105 -0.06 96
IV.FOSV.EHZ. 2021-03-21T08:43:49.00 0.1 undecidable manual P 43 23.2545 110 -0.04 98
IV.ATVA.EHN. 2021-03-21T08:43:49.64 0.3 undecidable manual P 304 27.0507 108 -0.11 72
IV.ATFO.HNE. 2021-03-21T08:43:49.70 0.3 undecidable manual P 2 24.8529 109 0.36 68
IV.ASSB.HHZ. 2021-03-21T08:43:49.59 0.3 undecidable manual S 145 13.5753 122 -0.06 74
IV.MURB.HHZ. 2021-03-21T08:43:49.87 0.6 undecidable manual S 347 13.6752 122 0.19 48
IV.ATCC.EHZ. 2021-03-21T08:43:48.11 0.3 undecidable manual S 53 7.7811 138 0 76
IT.FOPC.HGZ. 2021-03-21T08:43:48.75 0.3 undecidable manual P 149 22.3554 111 -0.11 72
IV.ATLO.EHN. 2021-03-21T08:43:48.85 0.1 undecidable manual P 327 22.8549 111 -0.12 96
IV.ASSB.HHZ. 2021-03-21T08:43:47.28 0.1 negative manual P 145 13.5753 122 -0.01 100
IV.MURB.HHZ. 2021-03-21T08:43:47.50 0.1 undecidable manual P 347 13.6752 122 0.19 96
IV.ATCC.EHZ. 2021-03-21T08:43:46.50 0.1 positive manual P 53 7.7811 138 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.5 0.00037515905 0.0768 AML other m 2021-03-21T08:43:49.86
IV.ASSB.HHE. ML:1.4 0.00028684109999999995 0.1152 AML other m 2021-03-21T08:43:50.91
IV.FOSV.EHN. ML:1.1 0.000074434155 0.1792 AML other m 2021-03-21T08:43:53.17
IV.FOSV.EHE. ML:1.0 0.000061457865 0.16 AML other m 2021-03-21T08:43:54.48
IV.CESI.HHE. ML:1.2 0.00007732569999999999 0.16 AML other m 2021-03-21T08:43:55.39
IV.CESI.HHN. ML:1.2 0.00008107845 0.1408 AML other m 2021-03-21T08:43:57.07
IV.FRON.EHN. ML:1.2 0.000048733565 0.1216 AML other m 2021-03-21T08:43:59.61
IV.CSP1.EHN. ML:1.7 0.0001327399 0.32 AML other m 2021-03-21T08:44:01.72
IV.CSP1.EHE. ML:1.7 0.000119958895 0.3392 AML other m 2021-03-21T08:44:02.02
IV.GAVE.EHE. ML:1.5 0.00006636181 0.2176 AML other m 2021-03-21T08:44:03.83
IV.GAVE.EHN. ML:1.3 0.000038613145 0.1344 AML other m 2021-03-21T08:44:06.28
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