Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 28-09-2021 and time 07:59:26 (UTC) in region 9 km N Valfabbrica (PG)

A magnitude ML 1.2 earthquake occured in region: 9 km N Valfabbrica (PG), on

  • 28-09-2021 07:59:26 (UTC)
  • 28-09-2021 09:59:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2350, 12.6230 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.

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 9 3389 3389
Fossato di Vico PG 13 2840 6229
Gualdo Tadino PG 13 15208 21437
Gubbio PG 14 32216 53653
Sigillo PG 14 2404 56057
Costacciaro PG 16 1216 57273
Assisi PG 18 28299 85572
Scheggia e Pascelupo PG 19 1393 86965
Nocera Umbra PG 19 5839 92804
Bastia Umbra PG 20 21874 114678

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NE of Perugia (166134 inhabitants)
32 Km N of Foligno (57155 inhabitants)
65 Km E of Arezzo (99543 inhabitants)
75 Km SW of Fano (60888 inhabitants)
75 Km N of Terni (111501 inhabitants)
79 Km SW of Pesaro (94582 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
92 Km S of Rimini (147750 inhabitants)
100 Km NE of Viterbo (67173 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 2021-09-28
07:59:26		 43.2353 12.6233 10 2022-03-30
13:04:09		 Bollettino Sismico Italiano INGV 96248471
Reviewed
Rev100 		ML 1.1 2021-09-28
07:59:26		 43.2253 12.6112 11 2021-09-28
08:42:46		 Sala Sismica INGV-Roma 95983501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-28 07:59:26 ± 0.03
Latitude 43.2353 ± 0.0018
Longitude 12.6233 ± 0.0025
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 96248471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 221
Semi-minor axis of confidence ellipse (meter) 132
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) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.05126
Epicentral distance of station farthest from the epicenter (degree) 0.40559
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 96248471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-08 13:57:09

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 95983501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-28 08:42:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAG.EHZ. 2021-09-28T07:59:42.10 0.6 undecidable manual S 14 45.0216 50 0.3 45
IV.FDMO.HHZ. 2021-09-28T07:59:41.68 0.6 undecidable manual S 120 43.5231 50 0.28 45
IV.EL6.EHZ. 2021-09-28T07:59:40.77 0.3 undecidable manual S 75 40.0266 50 0.32 67
IV.MML1.EHZ. 2021-09-28T07:59:38.27 0.3 undecidable manual S 116 31.2465 50 0.15 71
IV.FRON.EHZ. 2021-09-28T07:59:38.10 0.6 undecidable manual S 15 32.4453 50 -0.32 45
IV.ATPI.EHZ. 2021-09-28T07:59:37.72 0.6 undecidable manual S 323 29.8479 50 -0.01 49
IV.ATBU.EHZ. 2021-09-28T07:59:37.34 0.6 undecidable manual S 347 27.3504 109 0.35 46
IV.TB03.DHZ.01 2021-09-28T07:59:36.32 0.6 undecidable manual S 317 25.1526 111 0.03 49
IV.SNTG.HHZ. 2021-09-28T07:59:36.52 0.3 undecidable manual S 85 25.752 110 0.06 73
IV.SSFR.HHN. 2021-09-28T07:59:36.24 0.6 undecidable manual S 30 25.752 110 -0.22 47
IV.ATSC.EHE. 2021-09-28T07:59:35.14 0.1 undecidable manual S 14 21.5673 114 0.03 98
IV.ASSB.HHZ. 2021-09-28T07:59:35.11 0.1 undecidable manual S 172 21.5673 114 -0.01 99
IV.ATVO.HHZ. 2021-09-28T07:59:35.78 0.3 undecidable manual S 313 23.8539 112 -0.09 73
IV.MPAG.EHZ. 2021-09-28T07:59:35.41 0.3 undecidable manual P 14 45.0216 50 -0.11 70
IV.TB02.DHZ.01 2021-09-28T07:59:35.70 0.6 undecidable manual S 311 22.8549 112 0.16 48
IV.FDMO.HHZ. 2021-09-28T07:59:35.42 0.1 undecidable manual P 120 43.5231 50 0.13 93
IV.EL6.EHZ. 2021-09-28T07:59:34.72 0.1 undecidable manual P 75 40.0266 50 -0.03 95
IV.ARVD.HHZ. 2021-09-28T07:59:34.47 0.1 undecidable manual P 41 38.8278 50 -0.09 94
IV.NARO.HHZ. 2021-09-28T07:59:34.86 0.1 undecidable manual P 355 41.8248 50 -0.16 46
IV.ATLO.EHZ. 2021-09-28T07:59:34.56 0.1 undecidable manual S 297 19.5693 116 0.07 98
IV.ATPI.EHZ. 2021-09-28T07:59:33.18 0.1 undecidable manual P 323 29.8479 50 0 97
IV.MML1.EHZ. 2021-09-28T07:59:33.38 0.1 undecidable manual P 116 31.2465 50 -0.02 97
IV.ATFO.HHZ. 2021-09-28T07:59:33.35 0.1 undecidable manual S 344 15.1737 122 0.2 96
IV.FRON.EHZ. 2021-09-28T07:59:33.25 0.1 undecidable manual P 15 32.4453 50 -0.32 91
IV.SNTG.HHZ. 2021-09-28T07:59:32.34 0.1 undecidable manual P 85 25.752 110 -0.1 96
IV.ATBU.EHZ. 2021-09-28T07:59:32.76 0.1 undecidable manual P 347 27.3504 109 0.01 98
IV.TB03.DHZ.01 2021-09-28T07:59:32.40 0.1 undecidable manual P 317 25.1526 111 0.06 97
IV.ATVO.HHZ. 2021-09-28T07:59:32.00 0.1 undecidable manual P 313 23.8539 112 -0.1 96
IV.SSFR.HHN. 2021-09-28T07:59:32.20 0.1 undecidable manual P 30 25.752 110 -0.24 93
IV.ATLO.EHZ. 2021-09-28T07:59:31.26 0.1 undecidable manual P 297 19.5693 116 -0.05 98
IV.MURB.HHZ. 2021-09-28T07:59:31.43 0.1 undecidable manual S 291 8.5803 138 0.06 100
IV.ATSC.EHE. 2021-09-28T07:59:31.64 0.1 undecidable manual P 14 21.5673 114 -0.02 98
IV.ASSB.HHZ. 2021-09-28T07:59:31.58 0.1 undecidable manual P 172 21.5673 114 -0.09 97
IV.TB02.DHZ.01 2021-09-28T07:59:31.74 0.1 undecidable manual P 311 22.8549 112 -0.17 95
IV.ATFO.HHZ. 2021-09-28T07:59:30.72 0.1 undecidable manual P 344 15.1737 122 0.19 96
IV.ATCC.EHZ. 2021-09-28T07:59:30.65 0.1 undecidable manual S 166 5.6943 149 -0.14 99
IV.ATCC.EHZ. 2021-09-28T07:59:29.26 0.1 positive manual P 166 5.6943 149 0.09 100
IV.MURB.HHZ. 2021-09-28T07:59:29.61 0.1 positive manual P 291 8.5803 138 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1.7 0.0008814999999999999 0.3 AML other m 2021-09-28T07:59:30.83
IV.ATCC.EHE. ML:1.6 0.000653 1.48 AML other m 2021-09-28T07:59:30.86
IV.MURB.HHE. ML:1.9 0.001295 0.16 AML other m 2021-09-28T07:59:31.91
IV.MURB.HNE. ML:1.9 0.00127 1.84 AML other m 2021-09-28T07:59:31.92
IV.MURB.HHN. ML:1.8 0.0009599999999999999 0.22 AML other m 2021-09-28T07:59:32.70
IV.MURB.HNN. ML:1.7 0.0007235000000000001 0.22 AML other m 2021-09-28T07:59:32.60
IV.ATFO.HHE. ML:0.9 0.00008215 1.32 AML other m 2021-09-28T07:59:33.30
IV.ATFO.HHN. ML:0.8 0.00006379999999999999 1.46 AML other m 2021-09-28T07:59:33.24
IV.ASSB.HHN. ML:1.2 0.0001215 0.26 AML other m 2021-09-28T07:59:35.35
IV.ASSB.HHE. ML:1.3 0.0001505 0.28 AML other m 2021-09-28T07:59:35.42
IV.ATVO.HHN. ML:0.8 0.0000326 1.22 AML other m 2021-09-28T07:59:36.78
IV.SNTG.HHN. ML:1.3 0.00011724999999999999 0.2 AML other m 2021-09-28T07:59:36.67
IV.SNTG.HHE. ML:1.0 0.0000563 0.3 AML other m 2021-09-28T07:59:36.89
IV.ATVO.HHE. ML:0.9 0.00004895 0.86 AML other m 2021-09-28T07:59:37.06
IV.FRON.EHE. ML:1.0 0.00003925 1.38 AML other m 2021-09-28T07:59:38.86
IV.FRON.EHN. ML:1.0 0.000045350000000000005 0.54 AML other m 2021-09-28T07:59:40.38
IV.ARVD.HHN. ML:0.8 0.000021649999999999998 0.74 AML other m 2021-09-28T07:59:41.62
IV.ARVD.HHE. ML:0.8 0.00002005 0.26 AML other m 2021-09-28T07:59:41.39
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