Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 25-03-2021 and time 21:37:58 (Italy) in region 1 km NW Falerone (FM)

A magnitude ML 1.4 earthquake occured in region: 1 km NW Falerone (FM), on

  • 25-03-2021 20:37:58 (UTC)
  • 25-03-2021 21:37:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1140, 13.4720 at 21 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Falerone FM 1 3337 3337
Monte Vidon Corrado FM 1 731 4068
Montappone FM 3 1682 5750
Servigliano FM 4 2336 8086
Massa Fermana FM 4 963 9049
Montegiorgio FM 6 6851 15900
Belmonte Piceno FM 6 646 16546
Sant'Angelo in Pontano MC 6 1436 17982
Penna San Giovanni MC 7 1108 19090
Loro Piceno MC 8 2401 21491
Mogliano MC 8 4696 26187
Monsampietro Morico FM 9 659 26846
Monteleone di Fermo FM 9 395 27241
Ripe San Ginesio MC 9 852 28093
Monte San Martino MC 9 765 28858
Magliano di Tenna FM 10 1452 30310
Francavilla d'Ete FM 10 964 31274
Santa Vittoria in Matenano FM 11 1330 32604
Grottazzolina FM 11 3398 36002
Montottone FM 11 979 36981
Colmurano MC 11 1263 38244
Rapagnano FM 11 2145 40389
Montelparo FM 12 778 41167
Gualdo MC 12 815 41982
Urbisaglia MC 12 2628 44610
Petriolo MC 12 1998 46608
Smerillo FM 12 365 46973
Monte San Pietrangeli FM 12 2458 49431
San Ginesio MC 13 3498 52929
Monte Rinaldo FM 13 379 53308
Monte Giberto FM 13 801 54109
Torre San Patrizio FM 14 2048 56157
Montefalcone Appennino FM 14 424 56581
Ortezzano FM 14 774 57355
Monte Vidon Combatte FM 15 433 57788
Ponzano di Fermo FM 15 1674 59462
Corridonia MC 15 15430 74892
Petritoli FM 16 2335 77227
Sarnano MC 16 3264 80491
Force AP 17 1354 81845
Camporotondo di Fiastrone MC 17 563 82408
Monte San Giusto MC 17 8191 90599
Cessapalombo MC 17 512 91111
Amandola FM 17 3629 94740
Montalto delle Marche AP 18 2122 96862
Comunanza AP 18 3166 100028
Montedinove AP 18 488 100516
Tolentino MC 19 20069 120585
Montegranaro FM 19 12990 133575
Rotella AP 19 906 134481
Monte Urano FM 19 8353 142834
Carassai AP 19 1100 143934
Belforte del Chienti MC 20 1886 145820
Pollenza MC 20 6618 152438

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km NW of Teramo (54892 inhabitants)
56 Km S of Ancona (100861 inhabitants)
65 Km E of Foligno (57155 inhabitants)
85 Km N of L'Aquila (69753 inhabitants)
87 Km NW of Montesilvano (53738 inhabitants)
88 Km E of Perugia (166134 inhabitants)
89 Km SE of Fano (60888 inhabitants)
91 Km NE of Terni (111501 inhabitants)
94 Km NW of Pescara (121014 inhabitants)
99 Km SE of Pesaro (94582 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.4 2021-03-25
20:37:58		 43.1135 13.4723 21 2021-07-12
16:55:05		 Bollettino Sismico Italiano INGV 88879591
Reviewed
Rev100 		ML 1.4 2021-03-25
20:37:58		 43.112 13.4792 21 2021-03-25
20:46:37		 Sala Sismica INGV-Roma 88469191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-25 20:37:58 ± 0.13
Latitude 43.1135 ± 0.0072
Longitude 13.4723 ± 0.0086
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88879591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 836
Semi-minor axis of confidence ellipse (meter) 525
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 334
Circular confidence region, given by single value of horizontal uncertainty (meter) 840.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38311
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 88879591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-07 10:26:25

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 88469191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-25 20:46:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-03-25T20:38:12.75 3.0 negative manual Pg 0.24 0
IV.MMO1.EHZ. 2021-03-25T20:38:08.51 0.3 undecidable manual S 206 26.5512 121 -0.07 71
IV.GUMA.HHZ. 2021-03-25T20:38:06.02 0.3 undecidable manual S 243 12.4764 145 0.23 71
IV.NRCA.HHZ. 2021-03-25T20:38:06.48 0.1 undecidable manual P 223 42.5241 108 0.01 94
IV.FDMO.HHZ. 2021-03-25T20:38:05.12 0.1 undecidable manual P 255 32.3454 115 0.11 94
IV.MF5.EHN. 2021-03-25T20:38:05.95 0.3 undecidable manual S 184 13.9749 142 -0.08 73
IV.SAP2.EHZ. 2021-03-25T20:38:05.04 0.3 undecidable manual S 253 6.1938 161 0.01 75
IV.MNTT.EHZ. 2021-03-25T20:38:05.92 0.3 undecidable manual S 120 11.4774 147 0.27 70
IV.MMO1.EHZ. 2021-03-25T20:38:04.06 0.1 undecidable manual P 206 26.5512 121 -0.15 94
IV.MNTP.HNE. 2021-03-25T20:38:04.68 0.1 undecidable manual S 354 2.6973 172 -0.13 99
IV.SAP2.EHZ. 2021-03-25T20:38:02.14 0.1 undecidable manual P 253 6.1938 161 -0.02 100
IV.MNTT.EHZ. 2021-03-25T20:38:02.52 0.1 undecidable manual P 120 11.4774 147 0.01 99
IV.GUMA.HHZ. 2021-03-25T20:38:02.68 0.1 undecidable manual P 243 12.4764 145 0.08 98
IV.MF5.EHN. 2021-03-25T20:38:02.72 0.1 positive manual P 184 13.9749 142 -0.02 98
IV.MNTP.HNE. 2021-03-25T20:38:01.92 0.1 undecidable manual P 354 2.6973 172 -0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SAP2.EHN. ML:1.6 0.00028523929999999995 0.1792 AML other m 2021-03-25T20:38:05.25
IV.SAP2.EHE. ML:0.9 0.00006165799 0.1536 AML other m 2021-03-25T20:38:05.60
IV.MNTT.EHN. ML:1.7 0.000367 0.2 AML other m 2021-03-25T20:38:06.04
IV.MNTT.EHE. ML:2.0 0.0006215 0.12 AML other m 2021-03-25T20:38:06.29
IV.FDMO.HHN. ML:0.7 0.000021249999999999998 0.24 AML other m 2021-03-25T20:38:10.62
IV.FDMO.HHE. ML:1.0 0.00003685 0.22 AML other m 2021-03-25T20:38:10.65
IV.NRCA.HHE. ML:1.4 0.0000751 0.16 AML other m 2021-03-25T20:38:13.16
IV.NRCA.HHN. ML:1.5 0.00008752111499999999 0.1536 AML other m 2021-03-25T20:38:13.55
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