Earthquake with magnitude of ML 0.9 on date 17-02-2021 and time 19:41:27 (UTC) in region 4 km SW Acquacanina (MC)

A magnitude ML 0.9 earthquake occured in region: 4 km SW Acquacanina (MC), on

  • 17-02-2021 19:41:27 (UTC)
  • 17-02-2021 20:41:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43, 13.15 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
Acquacanina MC 4 121 121
Fiastra MC 4 559 680
Ussita MC 6 444 1124
Bolognola MC 6 142 1266
Fiordimonte MC 7 202 1468
Visso MC 9 1107 2575
Pievebovigliana MC 9 866 3441
Pieve Torina MC 10 1458 4899
Castelsantangelo sul Nera MC 11 281 5180
Monte Cavallo MC 12 145 5325
Muccia MC 13 915 6240
Sarnano MC 13 3264 9504
Cessapalombo MC 15 512 10016
Preci PG 16 724 10740
Camerino MC 17 6974 17714
Montefortino FM 17 1178 18892
Amandola FM 17 3629 22521
Caldarola MC 17 1823 24344
Gualdo MC 17 815 25159
Camporotondo di Fiastrone MC 18 563 25722
Serravalle di Chienti MC 18 1070 26792
Montemonaco AP 18 604 27396
San Ginesio MC 19 3498 30894

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
59 Km NW of Teramo (54892 inhabitants)
63 Km E of Perugia (166134 inhabitants)
63 Km NE of Terni (111501 inhabitants)
75 Km N of L'Aquila (69753 inhabitants)
75 Km SW of Ancona (100861 inhabitants)
95 Km S of Fano (60888 inhabitants)
98 Km NW of Montesilvano (53738 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 2021-02-17
19:41:27
43 13.15 10 2021-02-17
19:56:06
Sala Sismica INGV-Roma 87252621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-17 19:41:27 ± 0.11
Latitude 43.00 ± 0.00
Longitude 13.15 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87252621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 505
Semi-minor axis of confidence ellipse (meter) 433
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 9
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.22753
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 87252621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-17 19:56:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-02-17T19:41:36.90 0.3 undecidable manual S 92 0.2275 50 0.4 69
IV.CESI.HHZ. 2021-02-17T19:41:34.86 0.3 undecidable manual S 273 0.179 117 0.08 75
IV.NRCA.HHZ. 2021-02-17T19:41:34.17 0.3 undecidable manual S 189 0.1655 119 -0.16 74
IV.MMO1.EHZ. 2021-02-17T19:41:33.95 0.3 undecidable manual S 127 0.1628 119 -0.29 72
IV.CSP1.EHZ. 2021-02-17T19:41:32.26 0.3 undecidable manual S 23 0.1034 131 -0.1 75
IV.MC2.EHZ. 2021-02-17T19:41:32.56 0.3 undecidable manual S 161 0.0908 135 0.56 68
IV.MF5.EHZ. 2021-02-17T19:41:32.41 0.1 undecidable manual P 92 0.2275 50 -0.11 98
IV.NRCA.HHZ. 2021-02-17T19:41:31.08 0.3 undecidable manual P 189 0.1655 119 -0.19 73
IV.CESI.HHZ. 2021-02-17T19:41:31.36 0.1 undecidable manual P 273 0.179 117 -0.16 98
IV.FDMO.HHZ. 2021-02-17T19:41:31.48 0.3 undecidable manual S 311 0.0594 147 0.23 74
IV.MC2.EHZ. 2021-02-17T19:41:30.17 1.0 undecidable manual P 161 0.0908 135 0.25 24
IV.MMO1.EHZ. 2021-02-17T19:41:30.79 1.0 negative manual P 127 0.1628 119 -0.43 23
IV.FDMO.HHZ. 2021-02-17T19:41:29.58 0.3 positive manual P 311 0.0594 147 0.1 76
IV.CSP1.EHZ. 2021-02-17T19:41:29.99 0.1 undecidable manual P 23 0.1034 131 -0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.7 8.47E-5 0.16 AML other m 2021-02-17T19:41:31.67
IV.FDMO.HHN. ML:0.7 6.965E-5 0.14 AML other m 2021-02-17T19:41:31.86
IV.NRCA.HHE. ML:0.7 4.07E-5 0.12 AML other m 2021-02-17T19:41:34.35
IV.NRCA.HHN. ML:0.5 2.7210335E-5 0.1024 AML other m 2021-02-17T19:41:36.05
IV.CSP1.EHE. ML:0.8 6.4137585E-5 0.0896 AML other m 2021-02-17T19:41:32.44
IV.CSP1.EHN. ML:0.9 9.7274845E-5 0.1152 AML other m 2021-02-17T19:41:32.40
IV.NRCA.HNE. ML:1.2 0.0001404781 1.4848 AML other m 2021-02-17T19:41:34.36
IV.NRCA.HNN. ML:1.4 0.0001864051 0.96 AML other m 2021-02-17T19:41:35.56
IV.CESI.HHE. ML:0.3 1.3566085E-5 0.0768 AML other m 2021-02-17T19:41:35.35
IV.CESI.HHN. ML:0.5 2.250631E-5 0.1536 AML other m 2021-02-17T19:41:35.05
IV.CESI.HNE. ML:1.2 0.00011383725 1.536 AML other m 2021-02-17T19:41:35.31
IV.CESI.HNN. ML:1.4 0.000170035425 1.024 AML other m 2021-02-17T19:41:37.07
IV.MF5.EHE. ML:1.2 8.4413065E-5 13.9776 AML other m 2021-02-17T19:41:36.37
IV.MF5.EHN. ML:0.9 5.007187E-5 3.712 AML other m 2021-02-17T19:41:33.04
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