Earthquake with magnitude of ML 1.7 on date 22-01-2021 and time 22:47:38 (Italy) in region 6 km W Sassoferrato (AN)

A magnitude ML 1.7 earthquake occured in region: 6 km W Sassoferrato (AN), on

  • 22-01-2021 21:47:38 (UTC)
  • 22-01-2021 22:47:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.43, 12.79 at 14 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
Sassoferrato AN 6 7285 7285
Serra Sant'Abbondio PU 7 1027 8312
Frontone PU 10 1300 9612
Costacciaro PG 10 1216 10828
Scheggia e Pascelupo PG 10 1393 12221
Genga AN 12 1797 14018
Sigillo PG 12 2404 16422
Cantiano PU 14 2245 18667
Fabriano AN 14 31480 50147
Arcevia AN 14 4612 54759
Pergola PU 15 6333 61092
Fossato di Vico PG 15 2840 63932
Cagli PU 17 8731 72663
Serra San Quirico AN 18 2850 75513
Gubbio PG 19 32216 107729

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NE of Perugia (166134 inhabitants)
49 Km SW of Fano (60888 inhabitants)
53 Km N of Foligno (57155 inhabitants)
54 Km S of Pesaro (94582 inhabitants)
62 Km W of Ancona (100861 inhabitants)
72 Km S of Rimini (147750 inhabitants)
73 Km E of Arezzo (99543 inhabitants)
90 Km SE of Cesena (96758 inhabitants)
98 Km N of Terni (111501 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 2021-01-22
21:47:38
43.43 12.79 14 2021-01-22
21:52:14
Sala Sismica INGV-Roma 86471691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 21:47:38 ± 0.08
Latitude 43.43 ± 0.00
Longitude 12.79 ± 0.01
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86471691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 486
Semi-minor axis of confidence ellipse (meter) 288
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 64
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00719
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 86471691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 21:52:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHE. 2021-01-22T21:47:55.29 0.3 undecidable manual S 151 0.4506 94 0.49 63
IV.ATCC.EHZ. 2021-01-22T21:47:49.73 0.6 undecidable manual S 204 0.2707 98 0.24 45
IV.NARO.HHZ. 2021-01-22T21:47:48.56 0.3 undecidable manual S 320 0.2347 101 0.14 70
IV.CSP1.EHZ. 2021-01-22T21:47:47.91 1.0 positive manual P 138 0.4551 94 -0.27 22
IV.PIEI.HHZ. 2021-01-22T21:47:47.64 0.3 undecidable manual S 299 0.2122 103 -0.14 71
IV.FDMO.HHE. 2021-01-22T21:47:47.98 0.1 undecidable manual P 151 0.4506 94 -0.13 90
IV.FOSV.EHZ. 2021-01-22T21:47:45.54 0.1 undecidable manual S 189 0.1394 117 -0.21 95
IV.ARVD.HHZ. 2021-01-22T21:47:45.38 0.3 undecidable manual S 59 0.1277 120 -0.05 72
IV.ATCC.EHZ. 2021-01-22T21:47:45.06 0.6 undecidable manual P 204 0.2707 98 0.03 48
IV.ATSC.EHZ. 2021-01-22T21:47:44.26 0.3 undecidable manual S 264 0.0764 140 -0.01 74
IV.NARO.HHZ. 2021-01-22T21:47:44.44 0.3 positive manual P 320 0.2347 101 0.01 72
IV.SSFR.HNZ. 2021-01-22T21:47:43.52 0.1 undecidable manual S 301 0.0072 176 0.04 100
IV.PIEI.HHZ. 2021-01-22T21:47:43.93 0.1 negative manual P 299 0.2122 103 -0.12 94
IV.ARVD.HHZ. 2021-01-22T21:47:42.79 0.6 positive manual P 59 0.1277 120 0.09 49
IV.ATSC.EHZ. 2021-01-22T21:47:42.07 0.1 undecidable manual P 264 0.0764 140 0.04 98
IV.FOSV.EHZ. 2021-01-22T21:47:42.78 1.0 undecidable manual P 189 0.1394 117 -0.1 24
IV.SSFR.HNZ. 2021-01-22T21:47:41.68 0.6 undecidable manual P 301 0.0072 176 0.1 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHN. ML:1.7 0.000668 0.64 AML other m 2021-01-22T21:47:43.55
IV.SSFR.HHE. ML:1.6 0.0005915 0.28 AML other m 2021-01-22T21:47:43.55
IV.SSFR.HNN. ML:1.8 0.0008915 0.32 AML other m 2021-01-22T21:47:43.74
IV.SSFR.HNE. ML:1.8 0.0008115 0.24 AML other m 2021-01-22T21:47:43.76
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download