Earthquake with magnitude of ML 1.3 on date 20-02-2021 and time 00:44:45 (UTC) in region 4 km SE Montefortino (FM)

A magnitude ML 1.3 earthquake occured in region: 4 km SE Montefortino (FM), on

  • 20-02-2021 00:44:45 (UTC)
  • 20-02-2021 01:44:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.92, 13.37 at 20 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
Montefortino FM 4 1178 1178
Montemonaco AP 4 604 1782
Comunanza AP 6 3166 4948
Amandola FM 7 3629 8577
Palmiano AP 8 196 8773
Montegallo AP 9 523 9296
Roccafluvione AP 11 2010 11306
Montefalcone Appennino FM 11 424 11730
Venarotta AP 11 2066 13796
Force AP 11 1354 15150
Smerillo FM 12 365 15515
Monte San Martino MC 14 765 16280
Bolognola MC 14 142 16422
Sarnano MC 14 3264 19686
Santa Vittoria in Matenano FM 16 1330 21016
Penna San Giovanni MC 16 1108 22124
Rotella AP 16 906 23030
Acquasanta Terme AP 17 2916 25946
Gualdo MC 17 815 26761
Arquata del Tronto AP 17 1178 27939
Castelsantangelo sul Nera MC 18 281 28220
Montelparo FM 18 778 28998
Ascoli Piceno AP 19 49407 78405
Ussita MC 19 444 78849
Montedinove AP 19 488 79337
Monteleone di Fermo FM 20 395 79732

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Teramo (54892 inhabitants)
54 Km E of Foligno (57155 inhabitants)
63 Km N of L'Aquila (69753 inhabitants)
71 Km NE of Terni (111501 inhabitants)
78 Km NW of Montesilvano (53738 inhabitants)
79 Km S of Ancona (100861 inhabitants)
82 Km E of Perugia (166134 inhabitants)
86 Km NW of Pescara (121014 inhabitants)
91 Km NW of Chieti (51815 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 1.3 2021-02-20
00:44:45
42.92 13.37 20 2021-02-20
00:57:08
Sala Sismica INGV-Roma 87310071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-20 00:44:45 ± 0.1
Latitude 42.92 ± 0.00
Longitude 13.37 ± 0.00
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87310071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 346
Semi-minor axis of confidence ellipse (meter) 247
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34174
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 87310071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-20 00:57:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-02-20T00:45:00.12 3.0 undecidable manual S 149 0.3417 109 1.17 0
IV.CESI.HHZ. 2021-02-20T00:44:59.40 3.0 undecidable manual S 0
IV.SMA1.EHZ. 2021-02-20T00:44:57.48 0.6 undecidable manual S 185 0.2878 114 0.02 49
IV.MNTT.EHZ. 2021-02-20T00:44:56.60 3.0 undecidable manual S 49 0.2203 121 0.91 0
IV.NRCA.HHZ. 2021-02-20T00:44:55.37 0.6 undecidable manual S 246 0.2032 124 0.11 49
IV.MTRA.EHZ. 2021-02-20T00:44:54.25 0.6 undecidable manual S 172 0.1619 132 -0.05 49
IV.TERO.HHZ. 2021-02-20T00:44:53.63 0.6 negative manual P 149 0.3417 109 0.17 46
IV.MC2.EHZ. 2021-02-20T00:44:53.75 0.6 undecidable manual S 267 0.1304 139 0.11 49
IV.SMA1.EHZ. 2021-02-20T00:44:52.56 0.3 negative manual P 185 0.2878 114 -0.03 73
IV.MF5.EHZ. 2021-02-20T00:44:52.99 0.6 undecidable manual S 44 0.0971 148 -0.05 50
IV.MNTT.EHZ. 2021-02-20T00:44:51.74 0.6 negative manual P 49 0.2203 121 0.17 47
IV.NRCA.HHZ. 2021-02-20T00:44:51.25 0.1 negative manual P 246 0.2032 124 -0.07 98
IV.CESI.HHZ. 2021-02-20T00:44:51.55 3.0 positive manual P -0.32 0
IV.MC2.EHZ. 2021-02-20T00:44:50.35 1.0 negative manual P 267 0.1304 139 -0.03 25
IV.MTRA.EHZ. 2021-02-20T00:44:50.70 0.3 undecidable manual P 172 0.1619 132 -0.07 74
IV.MF5.EHZ. 2021-02-20T00:44:49.95 0.1 positive manual P 44 0.0971 148 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.7 0.000263 0.18 AML other m 2021-02-20T00:44:54.41
IV.MTRA.EHE. ML:1.4 0.0001475 0.46 AML other m 2021-02-20T00:44:54.64
IV.NRCA.HHN. ML:1.6 0.000222 0.12 AML other m 2021-02-20T00:44:55.58
IV.NRCA.HHE. ML:1.4 0.0001465 0.14 AML other m 2021-02-20T00:44:55.53
IV.SMA1.EHN. ML:0.9 3.095E-5 0.5 AML other m 2021-02-20T00:44:58.02
IV.SMA1.EHE. ML:1.2 5.83E-5 0.32 AML other m 2021-02-20T00:44:58.05
IV.TERO.HHE. ML:0.5 1.13E-5 0.62 AML other m 2021-02-20T00:45:00.56
IV.TERO.HHN. ML:0.7 1.605E-5 0.64 AML other m 2021-02-20T00:45:00.53
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