Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 22-08-2021 and time 09:20:51 (Italy) in region 3 km NW Fiastra (MC)

A magnitude ML 1.5 earthquake occured in region: 3 km NW Fiastra (MC), on

  • 22-08-2021 07:20:51 (UTC)
  • 22-08-2021 09:20:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0560, 13.1260 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
Fiastra MC 3 559 559
Pievebovigliana MC 3 866 1425
Fiordimonte MC 4 202 1627
Acquacanina MC 5 121 1748
Pieve Torina MC 6 1458 3206
Muccia MC 7 915 4121
Camerino MC 10 6974 11095
Bolognola MC 11 142 11237
Monte Cavallo MC 12 145 11382
Cessapalombo MC 12 512 11894
Ussita MC 12 444 12338
Caldarola MC 12 1823 14161
Camporotondo di Fiastrone MC 14 563 14724
Visso MC 14 1107 15831
Serravalle di Chienti MC 14 1070 16901
Serrapetrona MC 15 966 17867
Sarnano MC 15 3264 21131
Belforte del Chienti MC 15 1886 23017
San Ginesio MC 17 3498 26515
Gualdo MC 17 815 27330
Sefro MC 18 422 27752
Pioraco MC 18 1134 28886
Castelsantangelo sul Nera MC 18 281 29167
Castelraimondo MC 18 4587 33754
San Severino Marche MC 20 12726 46480

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
60 Km E of Perugia (166134 inhabitants)
65 Km NW of Teramo (54892 inhabitants)
67 Km NE of Terni (111501 inhabitants)
70 Km SW of Ancona (100861 inhabitants)
81 Km N of L'Aquila (69753 inhabitants)
88 Km S of Fano (60888 inhabitants)
97 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 1.5 2021-08-22
07:20:51		 43.0563 13.1258 9 2021-12-29
11:12:29		 Bollettino Sismico Italiano INGV 95262571
Reviewed
Rev100 		ML 1.7 2021-08-22
07:20:51		 43.0547 13.1328 10 2021-08-22
07:25:36		 Sala Sismica INGV-Roma 94486851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-22 07:20:51 ± 0.05
Latitude 43.0563 ± 0.0027
Longitude 13.1258 ± 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 95262571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 283
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 209
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) 59
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.48473
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 95262571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-10 09:37:52

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 94486851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-22 07:25:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.EHZ. 2021-08-22T07:21:40.32 3.0 undecidable manual S 2.71 0
IV.VVLD.HHZ. 2021-08-22T07:21:30.13 3.0 undecidable manual S -2.79 0
IV.ATVO.HHZ. 2021-08-22T07:21:13.79 3.0 undecidable manual S 0.05 0
IV.GAVE.EHZ. 2021-08-22T07:21:06.36 0.6 undecidable manual S 205 44.5221 50 0.1 47
IV.ATCC.EHZ. 2021-08-22T07:21:05.95 0.6 undecidable manual S 290 41.8248 50 0.41 45
IV.ASSB.HHZ. 2021-08-22T07:21:04.50 0.6 undecidable manual S 268 37.9287 50 0.02 49
IV.CING.HHZ. 2021-08-22T07:21:03.77 0.3 undecidable manual S 9 35.8419 50 -0.17 71
IV.MF5.EHZ. 2021-08-22T07:21:02.58 0.6 undecidable manual S 106 28.1496 108 0.76 40
IV.EL6.EHZ. 2021-08-22T07:21:02.31 0.3 undecidable manual S 356 30.3474 50 -0.16 72
IV.MURB.HHZ. 2021-08-22T07:21:01.49 0.3 undecidable manual P 295 53.8017 50 0.03 71
IV.GAVE.EHZ. 2021-08-22T07:21:00.12 0.6 undecidable manual P 205 44.5221 50 0.08 48
IV.MMO1.EHZ. 2021-08-22T07:21:00.23 0.3 undecidable manual S 137 23.8539 111 -0.2 72
IV.SMA1.EHZ. 2021-08-22T07:21:00.87 0.3 undecidable manual P 160 50.2164 50 -0.04 71
IV.NRCA.HHZ. 2021-08-22T07:21:00.39 0.3 undecidable manual S 182 24.753 111 -0.32 70
IV.CESI.HHZ. 2021-08-22T07:20:59.08 0.3 undecidable manual S 252 18.87 116 0.25 72
IV.ATCC.EHZ. 2021-08-22T07:20:59.66 0.6 undecidable manual P 290 41.8248 50 0.04 48
IV.MNTT.EHZ. 2021-08-22T07:20:59.97 3.0 negative manual P 0.52 0
IV.ASSB.HHZ. 2021-08-22T07:20:58.86 0.1 positive manual P 268 37.9287 50 -0.15 95
IV.CING.HHZ. 2021-08-22T07:20:58.51 0.3 undecidable manual P 9 35.8419 50 -0.19 71
IV.EL6.EHZ. 2021-08-22T07:20:57.63 0.3 undecidable manual P 356 30.3474 50 -0.22 71
IV.MF5.EHZ. 2021-08-22T07:20:57.89 0.1 positive manual P 106 28.1496 108 0.42 91
IV.MML1.EHZ. 2021-08-22T07:20:57.44 0.3 undecidable manual S 297 13.9749 124 0.06 76
IV.MDAR.HNZ. 2021-08-22T07:20:57.64 0.3 undecidable manual S 5 15.1737 122 -0.09 75
IV.NRCA.HHZ. 2021-08-22T07:20:56.70 0.3 undecidable manual P 182 24.753 111 -0.13 73
IV.MMO1.EHZ. 2021-08-22T07:20:56.52 0.3 undecidable manual P 137 23.8539 111 -0.15 73
IV.MML1.EHZ. 2021-08-22T07:20:55.05 0.3 undecidable manual P 297 13.9749 124 0.14 74
IV.MDAR.HNZ. 2021-08-22T07:20:55.26 0.3 undecidable manual P 5 15.1737 122 0.15 74
IV.CSP1.EHZ. 2021-08-22T07:20:55.54 0.3 undecidable manual S 58 7.4814 141 -0.17 75
IV.CESI.HHZ. 2021-08-22T07:20:55.95 0.3 undecidable manual P 252 18.87 116 0.2 73
IV.FDMO.HHZ. 2021-08-22T07:20:54.60 0.3 undecidable manual S 235 3.7962 158 -0.45 71
IV.CSP1.EHZ. 2021-08-22T07:20:54.10 0.1 positive manual P 58 7.4814 141 0.16 100
IV.FDMO.HHZ. 2021-08-22T07:20:53.60 0.3 undecidable manual P 235 3.7962 158 0.04 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHN. ML:1.9 0.000828 0.18 AML other m 2021-08-22T07:20:57.63
IV.MML1.HNN. ML:1.9 0.0008449999999999999 0.18 AML other m 2021-08-22T07:20:57.54
IV.MML1.HNE. ML:1.9 0.000889 0.18 AML other m 2021-08-22T07:20:57.79
IV.MML1.EHE. ML:1.9 0.0008975 0.18 AML other m 2021-08-22T07:20:57.79
IV.CESI.HHN. ML:1.4 0.00021 0.14 AML other m 2021-08-22T07:20:59.36
IV.CESI.HHE. ML:1.2 0.000132 0.46 AML other m 2021-08-22T07:21:00.41
IV.NRCA.HHN. ML:1.6 0.000223 1.12 AML other m 2021-08-22T07:21:02.85
IV.NRCA.HHE. ML:1.6 0.00023649999999999998 1.32 AML other m 2021-08-22T07:21:02.18
IV.MF5.EHN. ML:1.5 0.00016885 0.26 AML other m 2021-08-22T07:21:02.88
IV.CING.HHE. ML:1.5 0.000126 0.78 AML other m 2021-08-22T07:21:04.64
IV.CING.HHN. ML:1.5 0.00013000000000000002 0.28 AML other m 2021-08-22T07:21:04.39
IV.ASSB.HHN. ML:1.8 0.0002155 0.36 AML other m 2021-08-22T07:21:04.72
IV.MF5.EHE. ML:1.6 0.000191 0.62 AML other m 2021-08-22T07:21:05.26
IV.ASSB.HHE. ML:1.5 0.00011224999999999999 0.18 AML other m 2021-08-22T07:21:05.88
IV.MNTT.EHN. ML:1.6 0.00016025 1.42 AML other m 2021-08-22T07:21:08.76
IV.MURB.HHE. ML:2.0 0.0002495 0.4 AML other m 2021-08-22T07:21:10.19
IV.MURB.HHN. ML:1.8 0.000143 1.1 AML other m 2021-08-22T07:21:10.73
IV.SMA1.EHE. ML:1.3 0.00004765 0.44 AML other m 2021-08-22T07:21:11.92
IV.MNTT.EHE. ML:1.6 0.000132 1.36 AML other m 2021-08-22T07:21:11.79
IV.SMA1.EHN. ML:1.2 0.00004425 1.36 AML other m 2021-08-22T07:21:13.75
IV.ATVO.HHN. ML:1.1 0.0000206 1.62 AML other m 2021-08-22T07:21:14.04
IV.PIEI.HHN. ML:1.3 0.0000354 0.2 AML other m 2021-08-22T07:21:14.74
IV.MPAG.EHE. ML:1.1 0.00001785 0.48 AML other m 2021-08-22T07:21:15.23
IV.MPAG.EHN. ML:1.1 0.0000191 1.46 AML other m 2021-08-22T07:21:15.90
IV.PIEI.HHE. ML:1.3 0.00002985 0.5 AML other m 2021-08-22T07:21:17.30
IV.ATVO.HHE. ML:1.1 0.0000211 0.42 AML other m 2021-08-22T07:21:17.35
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