Earthquake with magnitude of ML 0.9 on date 25-02-2021 and time 06:12:19 (UTC) in region 4 km W Sassoferrato (AN)

A magnitude ML 0.9 earthquake occured in region: 4 km W Sassoferrato (AN), on

  • 25-02-2021 06:12:19 (UTC)
  • 25-02-2021 07:12:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.45, 12.82 at 8 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 4 7285 7285
Serra Sant'Abbondio PU 6 1027 8312
Frontone PU 10 1300 9612
Genga AN 10 1797 11409
Arcevia AN 12 4612 16021
Costacciaro PG 13 1216 17237
Scheggia e Pascelupo PG 13 1393 18630
Pergola PU 13 6333 24963
Fabriano AN 14 31480 56443
Sigillo PG 14 2404 58847
Cantiano PU 16 2245 61092
Serra San Quirico AN 16 2850 63942
Fossato di Vico PG 18 2840 66782
Cagli PU 18 8731 75513
Mergo AN 18 1037 76550
Cerreto d'Esi AN 20 3817 80367

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km SW of Fano (60888 inhabitants)
51 Km NE of Perugia (166134 inhabitants)
52 Km S of Pesaro (94582 inhabitants)
55 Km N of Foligno (57155 inhabitants)
60 Km W of Ancona (100861 inhabitants)
71 Km S of Rimini (147750 inhabitants)
75 Km E of Arezzo (99543 inhabitants)
89 Km SE of Cesena (96758 inhabitants)
100 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 0.9 2021-02-25
06:12:19
43.45 12.82 8 2021-02-25
06:18:42
Sala Sismica INGV-Roma 87473511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-25 06:12:19 ± 0.12
Latitude 43.45 ± 0.00
Longitude 12.82 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87473511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 379
Semi-minor axis of confidence ellipse (meter) 52
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 285
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.22213
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 87473511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-25 06:18:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PARC.HHZ. 2021-02-25T06:12:37.07 3.0 undecidable manual S 0.15 0
IV.EL6.EHZ. 2021-02-25T06:12:28.66 3.0 undecidable manual S -0.24 0
IV.MPAG.EHZ. 2021-02-25T06:12:27.12 0.3 undecidable manual S 347 0.1862 111 0.24 70
IV.ATFO.HHZ. 2021-02-25T06:12:27.51 0.3 undecidable manual S 246 0.1952 110 0.29 69
IV.PIEI.HHZ. 2021-02-25T06:12:27.95 0.1 undecidable manual S 293 0.2221 108 -0.24 93
IV.ATPI.EHZ. 2021-02-25T06:12:26.07 3.0 positive manual P -0.04 0
IV.FOSV.EHZ. 2021-02-25T06:12:25.89 0.1 undecidable manual S 195 0.1583 115 0.01 99
IV.MURB.HHZ. 2021-02-25T06:12:25.75 3.0 negative manual P 0.05 0
IV.NARO.HHZ. 2021-02-25T06:12:24.75 3.0 undecidable manual P -0.03 0
IV.FOSV.EHZ. 2021-02-25T06:12:23.08 0.1 undecidable manual P 195 0.1583 115 0.03 98
IV.FRON.EHZ. 2021-02-25T06:12:23.91 0.1 undecidable manual S 317 0.0962 127 0.09 98
IV.MPAG.EHZ. 2021-02-25T06:12:23.68 0.1 undecidable manual P 347 0.1862 111 0.05 97
IV.ARVD.HHZ. 2021-02-25T06:12:23.93 0.3 undecidable manual S 61 0.1034 125 -0.13 73
IV.ATFO.HHZ. 2021-02-25T06:12:23.81 0.3 undecidable manual P 246 0.1952 110 -0.01 73
IV.PIEI.HHZ. 2021-02-25T06:12:23.97 0.3 undecidable manual P 293 0.2221 108 -0.42 67
IV.SSFR.HHZ. 2021-02-25T06:12:22.06 0.1 undecidable manual S 245 0.0279 159 -0.11 99
IV.ARVD.HHZ. 2021-02-25T06:12:22.00 0.1 undecidable manual P 61 0.1034 125 0 100
IV.FRON.EHZ. 2021-02-25T06:12:21.98 0.1 undecidable manual P 317 0.0962 127 0.12 98
IV.SSFR.HHZ. 2021-02-25T06:12:20.99 0.1 undecidable manual P 245 0.0279 159 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHE. ML:0.8 7.755E-5 0.56 AML other m 2021-02-25T06:12:24.03
IV.ARVD.HHN. ML:1 0.000118 0.14 AML other m 2021-02-25T06:12:24.22
IV.ARVD.HHE. ML:1 0.000145 0.76 AML other m 2021-02-25T06:12:24.01
IV.FRON.EHN. ML:0.9 0.0001103 0.26 AML other m 2021-02-25T06:12:24.81
IV.FOSV.EHE. ML:0.7 4.305E-5 1.82 AML other m 2021-02-25T06:12:25.99
IV.FOSV.EHN. ML:0.7 3.98E-5 0.44 AML other m 2021-02-25T06:12:26.04
IV.MPAG.EHE. ML:0.7 4.185E-5 0.42 AML other m 2021-02-25T06:12:27.52
IV.MPAG.EHN. ML:0.7 3.95E-5 0.48 AML other m 2021-02-25T06:12:27.55
IV.ATFO.HHN. ML:0.8 5.04E-5 0.42 AML other m 2021-02-25T06:12:27.47
IV.PIEI.HHN. ML:0.8 3.41E-5 0.4 AML other m 2021-02-25T06:12:28.44
IV.PIEI.HHE. ML:1 6.58E-5 0.38 AML other m 2021-02-25T06:12:28.32
IV.ATFO.HHE. ML:1 6.46E-5 0.48 AML other m 2021-02-25T06:12:29.55
IV.MURB.HHE. ML:1.3 0.00010045 0.28 AML other m 2021-02-25T06:12:31.26
IV.MURB.HHN. ML:1.3 8.29E-5 0.22 AML other m 2021-02-25T06:12:31.42
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