Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-03-2021 and time 05:36:26 (UTC) in region 4 km SW Valfabbrica (PG)

A magnitude ML 1.5 earthquake occured in region: 4 km SW Valfabbrica (PG), on

  • 21-03-2021 05:36:26 (UTC)
  • 21-03-2021 06:36:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1380, 12.5580 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.

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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
Valfabbrica PG 4 3389 3389
Bastia Umbra PG 8 21874 25263
Assisi PG 9 28299 53562
Perugia PG 14 166134 219696
Bettona PG 15 4367 224063
Torgiano PG 16 6725 230788
Cannara PG 16 4305 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
14 Km E of Perugia (166134 inhabitants)
23 Km NW of Foligno (57155 inhabitants)
65 Km N of Terni (111501 inhabitants)
66 Km SE of Arezzo (99543 inhabitants)
87 Km SW of Fano (60888 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
91 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 1.5 2021-03-21
05:36:26		 43.138 12.5575 9 2021-07-12
16:55:04		 Bollettino Sismico Italiano INGV 88741901
Reviewed
Rev100 		ML 1.6 2021-03-21
05:36:26		 43.1383 12.5597 9 2021-03-21
05:50:58		 Sala Sismica INGV-Roma 88339261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-21 05:36:26 ± 0.05
Latitude 43.1380 ± 0.0027
Longitude 12.5575 ± 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 88741901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 374
Semi-minor axis of confidence ellipse (meter) 136
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61064
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 28
Type of magnitude ML
Reference to an origin 88741901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-14 13:10:24

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 88339261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-21 05:50:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOCL.EHZ. 2021-03-21T05:37:08.27 3.0 undecidable manual S -0.27 0
IV.MMO1.EHZ. 2021-03-21T05:36:48.39 0.6 undecidable manual S 113 67.7766 50 0.55 40
IV.CSP1.EHZ. 2021-03-21T05:36:44.29 0.6 undecidable manual S 95 52.7028 50 0.48 42
IV.NARO.HHZ. 2021-03-21T05:36:43.87 0.6 undecidable manual S 2 52.503 50 0.11 46
IV.EL6.EHZ. 2021-03-21T05:36:43.51 0.6 undecidable manual S 64 48.8178 50 0.72 39
IV.MGAB.HHZ. 2021-03-21T05:36:42.12 0.6 undecidable manual S 235 43.9227 50 0.64 40
IV.FRON.EHZ. 2021-03-21T05:36:41.42 0.6 undecidable manual S 18 44.2224 50 -0.14 46
IV.ATPI.EHZ. 2021-03-21T05:36:39.59 0.6 undecidable manual S 340 36.8298 50 0 48
IV.MOMA.HNZ. 2021-03-21T05:36:39.92 0.6 undecidable manual S 178 37.0296 50 0.27 45
IV.MMO1.EHZ. 2021-03-21T05:36:38.92 0.3 undecidable manual P 113 67.7766 50 -0.03 68
IV.ATMI.HHZ. 2021-03-21T05:36:38.86 0.6 undecidable manual S 313 31.9458 50 0.58 42
IV.SNTG.HHZ. 2021-03-21T05:36:38.57 0.6 undecidable manual S 67 33.5442 50 -0.15 47
IV.CESI.HHZ. 2021-03-21T05:36:37.97 0.6 undecidable manual S 118 31.746 50 -0.26 46
IV.TB01.DHZ.01 2021-03-21T05:36:37.21 0.6 undecidable manual S 340 28.749 107 -0.04 48
IV.TB02.DHZ.01 2021-03-21T05:36:37.17 0.6 undecidable manual S 335 28.4493 107 0.03 48
IV.CAFI.HHZ. 2021-03-21T05:36:36.78 0.3 undecidable manual P 294 52.3032 50 0.22 67
IV.NARO.HHZ. 2021-03-21T05:36:36.36 0.3 undecidable manual P 2 52.503 50 -0.23 67
IV.GAVE.EHN. 2021-03-21T05:36:36.88 0.3 undecidable manual P 151 56.499 50 -0.34 65
IV.CSP1.EHZ. 2021-03-21T05:36:36.53 0.3 undecidable manual P 95 52.7028 50 -0.09 69
IV.ATFO.HNZ. 2021-03-21T05:36:36.66 0.6 undecidable manual S 3 25.3524 109 0.52 44
IV.ATVA.EHZ. 2021-03-21T05:36:36.24 0.6 undecidable manual S 305 26.9508 108 -0.42 45
IV.FRON.EHZ. 2021-03-21T05:36:35.11 0.3 undecidable manual P 18 44.2224 50 -0.22 68
IV.FOSV.EHZ. 2021-03-21T05:36:35.88 0.6 undecidable manual S 43 23.9538 110 0.21 47
IV.EL6.EHZ. 2021-03-21T05:36:35.81 0.3 undecidable manual P 64 48.8178 50 -0.22 67
IT.FOPC.HGZ. 2021-03-21T05:36:35.39 0.6 undecidable manual S 148 22.0668 112 0.32 46
IV.ATLO.EHZ. 2021-03-21T05:36:35.41 0.6 undecidable manual S 328 23.0547 111 0.02 49
IV.MGAB.HHZ. 2021-03-21T05:36:35.47 0.3 undecidable manual P 235 43.9227 50 0.19 68
IV.SNTG.HHZ. 2021-03-21T05:36:33.53 0.3 undecidable manual P 67 33.5442 50 -0.15 70
IV.MURB.HHZ. 2021-03-21T05:36:33.01 0.6 undecidable manual S 349 14.0748 122 0.41 46
IV.MOMA.HNZ. 2021-03-21T05:36:33.57 0.3 undecidable manual P 178 37.0296 50 -0.65 61
IV.CESI.HHZ. 2021-03-21T05:36:33.14 0.1 undecidable manual P 118 31.746 50 -0.26 92
IV.ATPI.EHZ. 2021-03-21T05:36:33.99 0.3 undecidable manual P 340 36.8298 50 -0.2 69
IV.ATMI.HHZ. 2021-03-21T05:36:33.44 0.3 undecidable manual P 313 31.9458 50 0.01 73
IV.TB02.DHZ.01 2021-03-21T05:36:32.57 0.1 undecidable manual P 335 28.4493 107 -0.2 94
IV.ATFO.HNZ. 2021-03-21T05:36:32.05 0.3 undecidable manual P 3 25.3524 109 -0.14 71
IV.ATVA.EHZ. 2021-03-21T05:36:32.50 0.3 undecidable manual P 305 26.9508 108 0 73
IV.ASSB.HHZ. 2021-03-21T05:36:32.40 0.6 undecidable manual S 142 13.3755 124 0.02 50
IV.TB01.DHZ.01 2021-03-21T05:36:32.66 0.3 undecidable manual P 340 28.749 107 -0.18 70
IV.ATLO.EHZ. 2021-03-21T05:36:31.68 0.1 undecidable manual P 328 23.0547 111 -0.09 97
IV.ATCC.EHZ. 2021-03-21T05:36:31.08 0.6 undecidable manual S 52 8.4804 136 0.01 50
IV.FOSV.EHZ. 2021-03-21T05:36:31.81 0.1 undecidable manual P 43 23.9538 110 -0.12 96
IT.FOPC.HGZ. 2021-03-21T05:36:31.66 0.3 undecidable manual P 148 22.0668 112 0.08 73
IV.MURB.HHZ. 2021-03-21T05:36:30.35 0.1 undecidable manual P 349 14.0748 122 0.2 96
IV.ASSB.HHZ. 2021-03-21T05:36:30.08 0.1 undecidable manual P 142 13.3755 124 0.05 99
IV.ATCC.EHZ. 2021-03-21T05:36:29.31 0.1 undecidable manual P 52 8.4804 136 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:2.0 0.001395 0.34 AML other m 2021-03-21T05:36:31.49
IV.ATCC.EHE. ML:2.0 0.00158 0.36 AML other m 2021-03-21T05:36:31.76
IV.ASSB.HHN. ML:1.6 0.0004395 1.14 AML other m 2021-03-21T05:36:32.63
IV.ASSB.HHE. ML:1.4 0.00028300000000000005 1.42 AML other m 2021-03-21T05:36:33.07
IV.MURB.HHE. ML:2.3 0.00234 0.3 AML other m 2021-03-21T05:36:33.34
IV.MURB.HNE. ML:2.3 0.0020350000000000004 0.28 AML other m 2021-03-21T05:36:33.34
IV.MURB.HHN. ML:2.2 0.0015699999999999998 1.02 AML other m 2021-03-21T05:36:34.28
IV.MURB.HNN. ML:2.1 0.0014399999999999999 0.3 AML other m 2021-03-21T05:36:34.29
IV.FOSV.EHN. ML:1.1 0.00007723018500000001 0.16 AML other m 2021-03-21T05:36:35.95
IV.FOSV.EHE. ML:1.1 0.00007285818499999999 0.16 AML other m 2021-03-21T05:36:37.33
IV.ATMI.HHN. ML:1.2 0.00006862072999999999 2.1984 AML other m 2021-03-21T05:36:37.60
IV.CESI.HHN. ML:1.2 0.0000626662 0.48 AML other m 2021-03-21T05:36:38.45
IV.SNTG.HHN. ML:1.3 0.000088990115 0.3584 AML other m 2021-03-21T05:36:39.01
IV.ATMI.HHE. ML:1.1 0.000058823365 3.5584 AML other m 2021-03-21T05:36:37.45
IV.SNTG.HHE. ML:1.2 0.000077249265 0.24 AML other m 2021-03-21T05:36:39.44
IV.ATPI.HNN. ML:1.5 0.000124932525 1.3824 AML other m 2021-03-21T05:36:40.25
IV.ATPI.EHN. ML:1.3 0.000070866975 1.1808 AML other m 2021-03-21T05:36:40.25
IV.FRON.EHN. ML:1.5 0.000103472095 1.4208 AML other m 2021-03-21T05:36:42.48
IV.FRON.EHE. ML:1.3 0.000066372925 2.48 AML other m 2021-03-21T05:36:42.73
IV.EL6.EHE. ML:1.8 0.00017696784999999998 1.9808 AML other m 2021-03-21T05:36:43.50
IV.NARO.HHN. ML:1.2 0.000037392454999999995 2.3008 AML other m 2021-03-21T05:36:44.23
IV.EL6.EHN. ML:1.7 0.00013886593499999998 2.1792 AML other m 2021-03-21T05:36:44.28
IV.CSP1.EHN. ML:1.8 0.00017464770000000002 0.3008 AML other m 2021-03-21T05:36:44.40
IV.NARO.HHE. ML:1.5 0.000073859235 3.4016 AML other m 2021-03-21T05:36:45.33
IV.CAFI.HHE. ML:1.1 0.000028749999999999997 0.52 AML other m 2021-03-21T05:36:45.71
IV.CSP1.EHE. ML:1.9 0.00020429785 2.7008 AML other m 2021-03-21T05:36:44.55
IV.CAFI.HHN. ML:0.9 0.00001755 0.56 AML other m 2021-03-21T05:36:46.06
IV.CESI.HHE. ML:1.4 0.00010635 0.42 AML other m 2021-03-21T05:36:48.46
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