Earthquake with magnitude of ML 1.7 on date 22-08-2021 and time 09:20:51 (Italy) in region 3 km NW Fiastra (MC)

A magnitude ML 1.7 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) 43.055, 13.133 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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
Fiordimonte MC 4 202 761
Pievebovigliana MC 4 866 1627
Acquacanina MC 4 121 1748
Pieve Torina MC 7 1458 3206
Muccia MC 8 915 4121
Bolognola MC 10 142 4263
Camerino MC 11 6974 11237
Cessapalombo MC 12 512 11749
Caldarola MC 12 1823 13572
Ussita MC 12 444 14016
Monte Cavallo MC 13 145 14161
Sarnano MC 14 3264 17425
Camporotondo di Fiastrone MC 14 563 17988
Visso MC 14 1107 19095
Serrapetrona MC 15 966 20061
Serravalle di Chienti MC 15 1070 21131
Belforte del Chienti MC 15 1886 23017
San Ginesio MC 16 3498 26515
Gualdo MC 17 815 27330
Castelsantangelo sul Nera MC 18 281 27611
Sefro MC 18 422 28033
Pioraco MC 18 1134 29167
Castelraimondo MC 18 4587 33754
San Severino Marche MC 20 12726 46480
Amandola FM 20 3629 50109

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
61 Km E of Perugia (166134 inhabitants)
64 Km NW of Teramo (54892 inhabitants)
68 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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
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 ± 0.06
Latitude 43.0547 ± 0.0027
Longitude 13.1328 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94486851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 308
Semi-minor axis of confidence ellipse (meter) 264
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32376
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 9
Magnitude information

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 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.PIEI.HHZ. 2021-08-22T07:21:14.16 3.0 undecidable manual S -0.52 0
IV.ATVO.HHZ. 2021-08-22T07:21:13.79 3.0 undecidable manual S 0.05 0
IV.MPAG.EHZ. 2021-08-22T07:21:04.40 3.0 negative manual P -0.04 0
IV.CING.HHZ. 2021-08-22T07:21:03.77 0.1 undecidable manual S 8 0.3238 50 -0.06 96
IV.EL6.EHZ. 2021-08-22T07:21:02.31 0.1 undecidable manual S 355 0.2752 50 -0.08 97
IV.MURB.HHZ. 2021-08-22T07:21:01.73 3.0 undecidable manual P 0.12 0
IV.SMA1.EHZ. 2021-08-22T07:21:00.89 3.0 negative manual P -0.39 0
IV.GAVE.EHZ. 2021-08-22T07:21:00.32 3.0 negative manual P 0.17 0
IV.MMO1.EHZ. 2021-08-22T07:21:00.23 0.3 undecidable manual S 138 0.2104 112 0.05 74
IV.NRCA.HHZ. 2021-08-22T07:21:00.39 0.3 undecidable manual S 184 0.2212 111 -0.19 72
IV.ATCC.EHZ. 2021-08-22T07:20:59.83 3.0 undecidable manual P 0.23 0
IV.CESI.HHZ. 2021-08-22T07:20:59.08 0.1 undecidable manual S 253 0.1736 116 0.17 97
IV.MNTT.EHZ. 2021-08-22T07:20:59.97 3.0 negative manual P 0.52 0
IV.CING.HHZ. 2021-08-22T07:20:58.51 0.3 undecidable manual P 8 0.3238 50 -0.08 72
IV.ASSB.HHZ. 2021-08-22T07:20:58.88 3.0 positive manual P -0.04 0
IV.MDAR.HNZ. 2021-08-22T07:20:57.64 0.1 undecidable manual S 3 0.1385 122 -0.06 100
IV.EL6.EHZ. 2021-08-22T07:20:57.63 0.3 undecidable manual P 355 0.2752 50 -0.13 72
IV.MF5.EHZ. 2021-08-22T07:20:57.92 3.0 positive manual P 0.15 0
IV.MML1.EHZ. 2021-08-22T07:20:57.44 0.1 undecidable manual S 297 0.1313 123 -0.05 100
IV.MMO1.EHZ. 2021-08-22T07:20:56.52 0.3 undecidable manual P 138 0.2104 112 0.04 74
IV.NRCA.HHZ. 2021-08-22T07:20:56.70 0.1 undecidable manual P 184 0.2212 111 -0.01 99
IV.MML1.EHZ. 2021-08-22T07:20:55.05 0.3 undecidable manual P 297 0.1313 123 0.12 74
IV.MDAR.HNZ. 2021-08-22T07:20:55.26 0.3 undecidable manual P 3 0.1385 122 0.21 72
IV.CSP1.EHZ. 2021-08-22T07:20:55.54 0.3 undecidable manual S 55 0.0648 143 -0.03 76
IV.CESI.HHZ. 2021-08-22T07:20:55.95 0.1 undecidable manual P 253 0.1736 116 0.2 96
IV.CSP1.EHZ. 2021-08-22T07:20:54.10 0.1 undecidable manual P 55 0.0648 143 0.28 96
IV.FDMO.HHZ. 2021-08-22T07:20:54.60 0.1 undecidable manual S 241 0.0378 156 -0.45 93
IV.FDMO.HHZ. 2021-08-22T07:20:53.59 0.3 undecidable manual P 241 0.0378 156 0.07 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:2.3 0.003555 0.16 AML other m 2021-08-22T07:20:54.71
IV.FDMO.HHN. ML:2.2 0.002665 0.16 AML other m 2021-08-22T07:20:54.76
IV.CSP1.EHE. ML:2.1 0.001995 1.26 AML other m 2021-08-22T07:20:55.95
IV.CSP1.EHN. ML:2.1 0.00192 0.44 AML other m 2021-08-22T07:20:56.17
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 0.000845 0.18 AML other m 2021-08-22T07:20:57.54
IV.MML1.EHE. ML:1.9 0.0008975 0.18 AML other m 2021-08-22T07:20:57.79
IV.MML1.HNE. ML:1.9 0.000889 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.EL6.EHN. ML:1.9 0.0004065 0.94 AML other m 2021-08-22T07:21:02.76
IV.NRCA.HHE. ML:1.6 0.0002365 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 0.00013 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 0.00011225 0.18 AML other m 2021-08-22T07:21:05.88
IV.ATCC.EHN. ML:1.9 0.000228 0.16 AML other m 2021-08-22T07:21:06.22
IV.ATCC.EHE. ML:1.9 0.0002685 0.16 AML other m 2021-08-22T07:21:06.34
IV.GAVE.EHE. ML:1.9 0.000258 0.3 AML other m 2021-08-22T07:21:06.57
IV.MNTT.EHN. ML:1.6 0.00016025 1.42 AML other m 2021-08-22T07:21:08.76
IV.GAVE.EHN. ML:1.7 0.000149 0.86 AML other m 2021-08-22T07:21:09.13
IV.MURB.HHE. ML:2 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 4.765E-5 0.44 AML other m 2021-08-22T07:21:11.92
IV.MNTT.EHE. ML:1.5 0.000132 1.36 AML other m 2021-08-22T07:21:11.79
IV.EL6.EHE. ML:2 0.0005209 1.58 AML other m 2021-08-22T07:21:12.16
IV.SMA1.EHN. ML:1.2 4.425E-5 1.36 AML other m 2021-08-22T07:21:13.75
IV.ATVO.HHN. ML:1.1 2.06E-5 1.62 AML other m 2021-08-22T07:21:14.04
IV.PIEI.HHN. ML:1.3 3.54E-5 0.2 AML other m 2021-08-22T07:21:14.74
IV.MPAG.EHE. ML:1.1 1.785E-5 0.48 AML other m 2021-08-22T07:21:15.23
IV.MPAG.EHN. ML:1.1 1.91E-5 1.46 AML other m 2021-08-22T07:21:15.90
IV.PIEI.HHE. ML:1.3 2.985E-5 0.5 AML other m 2021-08-22T07:21:17.30
IV.ATVO.HHE. ML:1.1 2.11E-5 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