Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 30-07-2021 and time 05:50:07 (Italy) in region 4 km N Assisi (PG)

A magnitude ML 2.3 earthquake occured in region: 4 km N Assisi (PG), on

  • 30-07-2021 03:50:07 (UTC)
  • 30-07-2021 05:50:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1070, 12.6220 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
Assisi PG 4 28299 28299
Valfabbrica PG 6 3389 31688
Bastia Umbra PG 7 21874 53562
Valtopina PG 12 1398 54960
Cannara PG 13 4305 59265
Spello PG 13 8645 67910
Nocera Umbra PG 14 5839 73749
Bettona PG 15 4367 78116
Torgiano PG 18 6725 84841
Foligno PG 18 57155 141996
Perugia PG 19 166134 308130
Bevagna PG 19 5081 313211
Gualdo Tadino PG 19 15208 328419

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Foligno (57155 inhabitants)
19 Km E of Perugia (166134 inhabitants)
61 Km N of Terni (111501 inhabitants)
72 Km SE of Arezzo (99543 inhabitants)
87 Km NE of Viterbo (67173 inhabitants)
88 Km SW of Fano (60888 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
93 Km S of Pesaro (94582 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 2.3 2021-07-30
03:50:07		 43.1072 12.6217 9 2021-12-29
11:12:50		 Bollettino Sismico Italiano INGV 97329291
Reviewed
Rev100 		ML 2.2 2021-07-30
03:50:08		 43.108 12.6027 5 2021-07-30
04:10:37		 Sala Sismica INGV-Roma 93382921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-30 03:50:07 ± 0.05
Latitude 43.1072 ± 0.0027
Longitude 12.6217 ± 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 97329291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 330
Semi-minor axis of confidence ellipse (meter) 170
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 63
Number of defining phases 53
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) 0.43257
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 93382921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-30 04:10:37

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 97329291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-08 01:24:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTRA.EHZ. 2021-07-30T03:50:31.64 3.0 undecidable manual S -0.28 0
IV.MF5.EHZ. 2021-07-30T03:50:30.85 3.0 undecidable manual S 0.16 0
IV.SAP2.EHZ. 2021-07-30T03:50:29.42 3.0 undecidable manual S 0.39 0
IV.CAFI.HHE. 2021-07-30T03:50:27.76 3.0 undecidable manual S 0.74 0
IV.OFFI.HHZ. 2021-07-30T03:50:24.51 3.0 undecidable manual P 0.45 0
IV.PIEI.HNN. 2021-07-30T03:50:23.97 0.1 undecidable manual S 352 48.0186 50 0.44 86
IV.FRON.EHZ. 2021-07-30T03:50:23.06 0.1 undecidable manual S 10 46.3203 50 -0.01 94
IV.EL6.EHZ. 2021-07-30T03:50:23.47 0.6 undecidable manual S 57 46.0206 50 0.49 43
IV.ATPC.HHE. 2021-07-30T03:50:22.92 0.1 undecidable manual S 342 43.5231 50 0.6 83
IV.ATBU.EHZ. 2021-07-30T03:50:22.23 0.1 undecidable manual S 352 41.3253 50 0.5 86
IV.MTRA.EHZ. 2021-07-30T03:50:22.58 3.0 undecidable manual P 0.77 0
IV.ATMI.HHE. 2021-07-30T03:50:21.00 0.6 undecidable manual S 311 38.1285 50 0.12 47
IV.ATPI.EHE. 2021-07-30T03:50:21.63 0.1 undecidable manual S 335 42.0246 50 -0.29 90
IV.MF5.EHZ. 2021-07-30T03:50:21.01 3.0 undecidable manual P -0.1 0
IV.SSFR.HHN. 2021-07-30T03:50:21.04 0.1 undecidable manual S 20 38.7279 50 -0.01 96
IV.SACS.HNE. 2021-07-30T03:50:20.20 3.0 undecidable manual P 0.26 0
IT.GNU.HGE. 2021-07-30T03:50:20.00 0.6 undecidable manual S 187 33.9438 50 0.24 46
IV.FDMO.HHN. 2021-07-30T03:50:20.87 0.1 undecidable manual S 102 38.5281 50 -0.13 94
IV.ATSC.EHE. 2021-07-30T03:50:20.24 0.1 undecidable manual S 8 35.5422 50 0.05 96
IV.MOMA.HHZ. 2021-07-30T03:50:19.90 0.6 undecidable manual S 187 33.9438 50 0.14 47
IV.ATVA.EHZ. 2021-07-30T03:50:19.00 0.6 undecidable manual S 305 33.1446 50 -0.57 43
IV.TB02.DHE.01 2021-07-30T03:50:19.50 0.6 undecidable manual S 330 33.8439 50 -0.25 46
IV.ATVO.HHZ. 2021-07-30T03:50:19.80 0.6 undecidable manual S 330 35.1426 50 -0.28 46
IV.SAP2.EHZ. 2021-07-30T03:50:19.98 3.0 undecidable manual P -0.17 0
IV.TB01.DHE.01 2021-07-30T03:50:19.60 0.6 undecidable manual S 334 33.9438 50 -0.17 47
IV.MML1.HNE. 2021-07-30T03:50:18.04 0.1 undecidable manual S 88 28.3494 107 0.01 98
IV.CAFI.HHE. 2021-07-30T03:50:18.72 3.0 undecidable manual P -0.27 0
IV.ATFO.HHZ. 2021-07-30T03:50:18.20 0.6 undecidable manual S 352 29.0487 107 -0.06 48
IV.ATLO.EHZ. 2021-07-30T03:50:18.10 0.6 undecidable manual S 323 28.8489 107 -0.09 48
IV.FRON.EHZ. 2021-07-30T03:50:17.16 0.1 undecidable manual P 10 46.3203 50 0.57 83
IV.CESI.HHZ. 2021-07-30T03:50:17.20 0.6 undecidable manual S 116 25.5522 109 0.08 48
IV.FOSV.HNN. 2021-07-30T03:50:16.70 0.6 undecidable manual S 28 23.6541 110 0.21 47
IV.MGAB.HNE. 2021-07-30T03:50:16.81 0.3 undecidable manual P 243 46.62 50 0.17 69
IV.ATPC.HHE. 2021-07-30T03:50:16.16 0.1 undecidable manual P 342 43.5231 50 0 95
IV.PIEI.HNN. 2021-07-30T03:50:16.92 0.1 undecidable manual P 352 48.0186 50 0.06 93
IV.EL6.EHZ. 2021-07-30T03:50:16.35 0.3 undecidable manual P 57 46.0206 50 -0.19 68
IV.ATBU.EHZ. 2021-07-30T03:50:15.78 0.1 undecidable manual P 352 41.3253 50 -0.04 95
IV.FDMO.HHN. 2021-07-30T03:50:15.24 0.1 undecidable manual P 102 38.5281 50 -0.15 93
IV.SSFR.HHN. 2021-07-30T03:50:15.07 0.1 undecidable manual P 20 38.7279 50 -0.35 89
IV.ATMI.HHE. 2021-07-30T03:50:15.36 0.6 undecidable manual P 311 38.1285 50 0.04 48
IV.MURB.HHZ. 2021-07-30T03:50:15.30 0.6 undecidable manual S 336 18.9699 115 0.32 47
IV.ATPI.EHE. 2021-07-30T03:50:15.67 0.1 undecidable manual P 335 42.0246 50 -0.26 91
IT.GNU.HGE. 2021-07-30T03:50:14.70 0.3 undecidable manual P 187 33.9438 50 0.02 72
IT.FOPC.HGN. 2021-07-30T03:50:14.70 0.6 undecidable manual S 157 16.6722 118 0.45 45
IV.ATSC.EHE. 2021-07-30T03:50:14.79 0.1 undecidable manual P 8 35.5422 50 -0.14 94
IT.UMBT.HGE. 2021-07-30T03:50:14.41 0.3 undecidable manual P 314 31.3464 106 0.16 71
IV.MOMA.HHZ. 2021-07-30T03:50:14.57 0.1 undecidable manual P 187 33.9438 50 -0.11 95
IV.ATVA.EHZ. 2021-07-30T03:50:14.50 0.1 undecidable manual P 305 33.1446 50 -0.06 96
IV.TB02.DHE.01 2021-07-30T03:50:14.36 0.3 undecidable manual P 330 33.8439 50 -0.31 68
IV.ATVO.HHZ. 2021-07-30T03:50:14.56 0.3 undecidable manual P 330 35.1426 50 -0.3 68
IV.TB01.DHE.01 2021-07-30T03:50:14.43 0.3 undecidable manual P 334 33.9438 50 -0.25 69
IV.ATFO.HHZ. 2021-07-30T03:50:13.77 0.3 undecidable manual P 352 29.0487 107 -0.04 73
IV.ATLO.EHZ. 2021-07-30T03:50:13.58 0.3 undecidable manual P 323 28.8489 107 -0.19 70
IV.MML1.HNE. 2021-07-30T03:50:13.58 0.1 positive manual P 88 28.3494 107 -0.1 96
IV.CESI.HHZ. 2021-07-30T03:50:13.13 0.1 negative manual P 116 25.5522 109 -0.02 98
IV.SEF1.HNN. 2021-07-30T03:50:12.87 0.1 undecidable manual P 80 26.751 108 -0.5 88
IV.FOSV.HNN. 2021-07-30T03:50:12.76 0.1 undecidable manual P 28 23.6541 110 -0.03 98
IV.MURB.HHZ. 2021-07-30T03:50:12.08 0.1 positive manual P 336 18.9699 115 0.16 96
IT.FOPC.HGN. 2021-07-30T03:50:11.77 0.1 negative manual P 157 16.6722 118 0.27 94
IV.ATCC.EHE. 2021-07-30T03:50:11.90 0.6 undecidable manual S 10 8.7801 135 -0.13 49
IV.ASSB.HHE. 2021-07-30T03:50:11.60 0.6 undecidable manual S 157 7.7811 138 -0.19 49
IV.ASSB.HHE. 2021-07-30T03:50:10.21 0.1 negative manual P 157 7.7811 138 0.13 99
IV.ATCC.EHE. 2021-07-30T03:50:10.27 0.1 positive manual P 10 8.7801 135 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:2.1 0.000812 1.74 AML other m 2021-07-30T03:50:17.06
IV.CESI.HNN. ML:2.1 0.0007710104 1.7408 AML other m 2021-07-30T03:50:17.06
IV.CESI.HHE. ML:2.2 0.0009116599 1.8208 AML other m 2021-07-30T03:50:17.95
IV.CESI.HNE. ML:2.1 0.0007958065000000001 1.8304 AML other m 2021-07-30T03:50:17.96
IV.ATFO.HHE. ML:2.2 0.00075006335 0.3392 AML other m 2021-07-30T03:50:19.30
IV.ATFO.HHN. ML:2.1 0.0006179262500000001 0.2784 AML other m 2021-07-30T03:50:19.78
IV.ATVO.HHN. ML:2.1 0.0005716525 0.2816 AML other m 2021-07-30T03:50:20.78
IV.ATVO.HHE. ML:2.2 0.0006835 1.68 AML other m 2021-07-30T03:50:23.92
IV.EL6.EHN. ML:2.4 0.0008455 0.2 AML other m 2021-07-30T03:50:24.74
IV.EL6.EHE. ML:2.4 0.000762 0.78 AML other m 2021-07-30T03:50:25.68
IV.MF5.EHN. ML:2.3 0.00033650000000000005 0.38 AML other m 2021-07-30T03:50:31.37
IV.SAP2.EHE. ML:2.2 0.0003105 0.16 AML other m 2021-07-30T03:50:31.68
IV.SAP2.EHN. ML:2.9 0.001555069 0.1408 AML other m 2021-07-30T03:50:31.59
IV.MF5.EHE. ML:2.3 0.00033499999999999996 0.92 AML other m 2021-07-30T03:50:31.26
IV.MTRA.HNN. ML:2.4 0.00043359225000000004 0.24 AML other m 2021-07-30T03:50:32.46
IV.MTRA.EHN. ML:2.4 0.0004367491 0.24 AML other m 2021-07-30T03:50:32.47
IV.MTRA.EHE. ML:2.2 0.000246 0.44 AML other m 2021-07-30T03:50:32.47
IV.MTRA.HNE. ML:2.2 0.00023627375000000002 0.24 AML other m 2021-07-30T03:50:36.43
IV.RM33.EHN. ML:1.9 0.00011453830000000001 1.5808 AML other m 2021-07-30T03:50:37.86
IV.RM33.EHE. ML:2.1 0.000169 0.32 AML other m 2021-07-30T03:50:39.67
IV.RM33.HNE. ML:2.2 0.0001867877 0.3296 AML other m 2021-07-30T03:50:39.67
IV.OFFI.HHE. ML:2.5 0.0003435 0.42 AML other m 2021-07-30T03:50:42.29
IV.RM33.HNN. ML:2.1 0.00016543945 0.4384 AML other m 2021-07-30T03:50:44.29
IV.OFFI.HHN. ML:2.4 0.00031 0.7 AML other m 2021-07-30T03:50:44.33
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
Waveforms Seismic signals in miniseed + resp format Download