Earthquake with magnitude of ML 1.1 on date 23-02-2020 and time 00:00:20 (Italy) in region 4 km SE Bolognola (MC)

A magnitude ML 1.1 earthquake occured in region: 4 km SE Bolognola (MC), on

  • 22-02-2020 23:00:20 (UTC)
  • 23-02-2020 00:00:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.96, 13.25 at 17 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
Bolognola MC 4 142 142
Montefortino FM 8 1178 1320
Ussita MC 9 444 1764
Sarnano MC 9 3264 5028
Amandola FM 9 3629 8657
Acquacanina MC 9 121 8778
Montemonaco AP 10 604 9382
Fiastra MC 11 559 9941
Castelsantangelo sul Nera MC 11 281 10222
Visso MC 13 1107 11329
Comunanza AP 14 3166 14495
Gualdo MC 14 815 15310
Fiordimonte MC 15 202 15512
Montegallo AP 15 523 16035
Cessapalombo MC 16 512 16547
Smerillo FM 17 365 16912
San Ginesio MC 17 3498 20410
Pievebovigliana MC 17 866 21276
Monte San Martino MC 17 765 22041
Montefalcone Appennino FM 18 424 22465
Penna San Giovanni MC 18 1108 23573
Pieve Torina MC 18 1458 25031
Camporotondo di Fiastrone MC 19 563 25594
Palmiano AP 19 196 25790
Sant'Angelo in Pontano MC 19 1436 27226
Preci PG 19 724 27950
Caldarola MC 19 1823 29773
Force AP 20 1354 31127

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
51 Km NW of Teramo (54892 inhabitants)
66 Km NE of Terni (111501 inhabitants)
69 Km N of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
76 Km SW of Ancona (100861 inhabitants)
89 Km NW of Montesilvano (53738 inhabitants)
97 Km NW of Pescara (121014 inhabitants)
99 Km S of Fano (60888 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
Rev 100 ML 1.1 2020-02-22
23:00:20
42.97 13.25 17 2020-02-22
23:05:33
Sala Sismica INGV-Roma 76734301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-22 23:00:20 ± 0.16
Latitude 42.97 ± 0.00
Longitude 13.25 ± 0.01
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76734301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 482
Semi-minor axis of confidence ellipse (meter) 442
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 10
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
Epicentral distance of station farthest from the epicenter (degree) 0.16368
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 76734301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-22 23:05:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-02-22T23:00:38.25 3.0 undecidable manual S 0.11 0
IV.TERO.HHZ. 2020-02-22T23:00:29.53 3.0 undecidable manual P -1.79 0
IV.NRCA.HHZ. 2020-02-22T23:00:28.36 0.1 undecidable manual S 217 0.1637 124 -0.09 98
IV.FDMO.HHZ. 2020-02-22T23:00:27.71 0.3 undecidable manual S 301 0.1367 131 -0.1 75
IV.CSP1.EHZ. 2020-02-22T23:00:27.57 0.6 undecidable manual S 346 0.1304 132 -0.1 50
IV.MNTT.EHZ. 2020-02-22T23:00:27.63 3.0 positive manual P -0.01 0
IV.CESI.HHZ. 2020-02-22T23:00:26.64 3.0 undecidable manual P 1.98 0
IV.MMO1.EHZ. 2020-02-22T23:00:26.70 0.3 undecidable manual S 138 0.0881 145 -0.14 74
IV.MC2.EHZ. 2020-02-22T23:00:26.77 0.3 undecidable manual S 218 0.0683 152 0.23 72
IV.NRCA.HHZ. 2020-02-22T23:00:25.10 0.1 undecidable manual P 217 0.1637 124 0 100
IV.MMO1.EHZ. 2020-02-22T23:00:24.13 0.1 undecidable manual P 138 0.0881 145 -0.04 100
IV.MC2.EHZ. 2020-02-22T23:00:24.16 0.1 undecidable manual P 218 0.0683 152 0.16 99
IV.FDMO.HHZ. 2020-02-22T23:00:24.73 0.3 undecidable manual P 301 0.1367 131 -0.01 75
IV.CSP1.EHZ. 2020-02-22T23:00:24.69 1.0 undecidable manual P 346 0.1304 132 0.04 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHN. ML:1.1 9.515E-5 0.28 AML other m 2020-02-22T23:00:27.86
IV.FDMO.HHE. ML:0.8 5.12E-5 1.34 AML other m 2020-02-22T23:00:27.32
IV.CSP1.EHE. ML:1 6.865E-5 1.04 AML other m 2020-02-22T23:00:28.57
IV.FDMO.HHN. ML:0.8 4.805E-5 1.32 AML other m 2020-02-22T23:00:28.98
IV.NRCA.HHN. ML:1.8 0.0004355 0.1 AML other m 2020-02-22T23:00:28.45
IV.NRCA.HHE. ML:1.8 0.0004545 0.12 AML other m 2020-02-22T23:00:28.59
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